Ravenclaw Tower lay silent, its twisting corridors and high arches steeped in midnight stillness. Harry sat by the faint light of his enchanted lamp, the walls of his private room casting long shadows as he sketched out a design on a scrap of parchment. His mind pulsed with ideas, his quill scratching faintly as he charted each detail.

A prison fit for Pettigrew.

Though no ward existed to prevent an Animagus from transforming, he could turn Pettigrew's cowardice into a binding force. If he created the trunk's interior with danger at every angle, the rat would not dare change form at all. The sheer brutality of the confined, razor-strewn trunk would make transformation fatal.

Harry visualized it mentally: a sturdy trunk with walls lined in jagged edges—broken potion beakers, rusted kitchen forks and knives, old nails—all fixed in place and angled inward. The center would hold a cage that Dobby could surely scrounge up in the Room of Hidden Things, small and claustrophobic, meant to keep the rat confined. A Bluebell flame in a jar would cast its cold blue light over everything, illuminating each threat. The note pinned in Pettigrew's line of sight would add one more layer to the prison, a final warning to keep him afraid, small, and obedient.

Satisfied, Harry leaned back, folding the parchment and slipping it into his robe pocket. With a quiet breath, he pushed himself to his feet and called softly, "Dobby."

The house-elf appeared with a silent pop, his eyes wide and watchful. "Master Harry?"

Harry pulled his Invisibility Cloak from its place in his trunk, letting it settle over his shoulders. "We're going to the Room," he said. "Stay close."

Once Dobby popped them to the appropriate blank stretch of wall, Harry closed his eyes briefly, conjuring the image in his mind—his dormitory room, leading to the Room of Hidden Things. As he paced, the door slowly materialized, and with one last nod at Dobby, he pushed it open.

Harry and Dobby entered the familiar setup he'd conjured for nights like these: his duplicate dorm room opening seamlessly into the chaotic expanse of the Room of Hidden Things. Here, piles of discarded artifacts stretched into the shadows, their outlines softened by the dim, ambient glow. Harry gestured toward the row of trunks, some of which his elf had filled with a heaping assortment of objects.

"Dobby, transfer the contents of the sturdiest trunk into one of the empty, rickety ones," he said, his voice low. Dobby's eyes gleamed with understanding as he darted off, weaving through the clutter with practiced precision. Meanwhile, Harry cleared a wide space on the floor, creating a workspace where he could assemble the prison-trunk without interference.

In a matter of moments, Dobby returned with the now-empty, scuffed trunk, its reinforced corners and sturdy hinges showing signs of age but holding up solidly. He patted it with a small, satisfied smile. "Will this trunk do, Master Harry?"

Harry inspected it, nodding at its thick wood and solid build. "Perfect." He opened the lid, listening to the hinges groan faintly as he began preparing the interior. His hands moved with steady precision as he laid out each sharp item he'd gathered: jagged shards of potion glass, twisted forks, and rusted nails, all angled inward. He secured each piece in place with a muttered Sticking Charm, testing their hold and spacing.

After lining the walls, he turned his attention to the underside of the trunk's lid, fixing more shards and broken metal pieces so they jutted downward, poised to strike if Pettigrew tried to transform. With these in place, the prison would become a death trap from every direction except the floor, leaving Pettigrew with no safe way to revert to his human form without severe consequences.

Dobby quickly returned, producing a small, rusty one with intact bars. He offered it to Harry, and Harry noted its size—perfect to hold a rat but far too confining for a human. It would serve exactly as he needed.

Placing the cage in the trunk's center, Harry left just enough space around it for the sharpened edges to pose a fatal threat if Pettigrew tried to transform. He added a jar of Bluebell flame in one corner, its cold light casting an unsettling glow over the jagged surfaces, each edge gleaming sharply. For the final touch, he pinned a note inside the cage, angling it so the words would be unavoidable: No escape, in this form or the other.

The last spell, a Permanent Password-Activated Toggling Lock, required Harry's full focus. He murmured the incantation, feeling the magic thrumming through him as the spell took hold, demanding more energy than expected. When it clicked into place, a sharp ache flared behind his eyes, and he pressed a hand to his temple, gritting his teeth.

"Master Harry should have this," Dobby murmured, appearing at his side with a steaming mug of hot chocolate. Harry took it with a nod, the warmth easing his headache and allowing him to think more clearly. He took a final, satisfied look at the completed trap, feeling a calm satisfaction settle within him.

As he drank, his gaze lingered on the rusty cage. If Pettigrew truly was hiding in his Animagus form, then capturing him might reveal more about the past—about Sirius Black, who might not be the villain he'd been made out to be. The Ministry, he knew, would likely make a mess of it, biased and unreliable. No, he'd need leverage to ensure justice was served exactly as he intended.

Setting the cup aside, Harry allowed his plans to settle. This was only the beginning, and he'd make certain Pettigrew had nowhere to run.

—

The Gryffindor common room was quieter than usual. Most students were either finishing up their last classes or wandering the corridors before dinner, leaving only a faint murmur in the otherwise empty room. Warm light seeped through the tall windows, bathing the crimson and gold decor in an amber glow. The fire crackled softly, casting flickering shadows across the worn, comfortable furniture.

George leaned back on the couch, giving his twin a quick nod as Ron got up, stretching and heading off to the bathroom. Scabbers remained on the cushion Ron had left behind, dozing—or so he seemed.

Perfect, George thought. Scabbers wouldn't know what hit him.

Fred shifted forward, throwing a furtive glance around the room. "Right then," he murmured just loud enough for Scabbers to hear, "about that plan for Ron…"

George fought down a grin, watching the rat from the corner of his eye. "Yeah," he muttered, deliberately low but clear, "he's been thick as ever this year, not noticing a thing about Ginny. And here we are, looking out for her."

Fred nodded, keeping his voice hushed. "Exactly. So, I've been working on a twist on Dungbombs—these won't just stink. They'll itch for days. Doesn't matter how much he scrubs, he won't shake it off."

George snorted, picturing Ron's horrified reaction. Perfect bait, he thought. "He'll walk right into it," he said with just the right amount of glee. "We'll catch him in the hallway."

Fred shrugged casually, leaning back with a smirk. "Yeah. He'll be scratching himself silly."

George paused, feigning a thoughtful look as he glanced toward Scabbers. "Wait—you think it'll hit Scabbers, too?"

Fred barely looked at the rat, giving an indifferent shrug. "Probably. But who cares? It's just a rat."

George gave an easy nod. "Right, good point. He'll survive."

They exchanged a final, knowing grin, letting their voices drop back to idle chatter. George watched from the corner of his eye as Scabbers shifted slightly, his whiskers twitching, beady eyes wide open now and fixed on them, wary and alert. George's satisfaction deepened. Take the bait, you little coward, he thought, seeing that slight twitch in Scabbers's posture, the way his tiny claws dug into the cushion. It wouldn't be long now.

—

It was finally time. Harry had sidled up to George in the hall between classes, just long enough to murmur that everything was ready—the prison was set, and all they needed to do was lure Ron and Scabbers to the spot. Fred had caught on immediately, and the three of them exchanged a quick look, a silent confirmation.

Now, he and Fred were leading Ron down an infrequently used corridor, Ron practically bouncing with excitement at the promise of a "giant enchanted chessboard." George felt a thrill of satisfaction; it was all coming together.

"Where is it, then?" Ron asked, craning his neck to look around as they slowed near the dimly lit alcove between two dusty suits of armor.

George exchanged a glance with Fred. It was time to set the bait. He took a breath, carefully controlling his tone. "Actually, Ron, before we get to the chessboard, there's something we need to talk about."

Ron's enthusiasm deflated instantly, and he turned to them, suspicious. "What? What's this about?"

George glanced at Scabbers, who sat alert in Ron's hand, his whiskers twitching like he was already planning an escape. Perfect, George thought. He looked back at Ron with a feigned seriousness. "You haven't noticed anything strange about Ginny lately, have you?"

Ron's brows furrowed, his expression defensive. "Ginny? No! She's fine, just a bit quiet, maybe. Mum says it's just adjusting to Hogwarts."

Fred rolled his eyes, crossing his arms. "Right, because you're just so observant, aren't you? Meanwhile, here we are, keeping an eye on her."

Ron flushed, clearly annoyed. "What do you mean? She doesn't need me fussing over her like some kind of—Ow!" He jerked as Scabbers bit his finger, squirming in Ron's hand, clearly agitated, causing him to drop the rat, which darted away down the corridor.

George caught Fred's eye. Now.

George kept his gaze locked on Scabbers, heart pounding as Fred tossed the first one with perfect aim. George followed with his own, releasing the invisible knockout gas in an instant cloud around the panicked rat.

Scabbers twitched, his tiny limbs stiffening, his small frame wobbling unsteadily. Just as he was about to tip over, he suddenly zoomed down the corridor, too fast even for a speedy rodent—only to vanish entirely.

George exchanged a quick look with Fred, both of them grinning with satisfaction. Harry's got him, George thought, feeling a surge of victory.

"Are you both mad?!" Ron exploded, his face a furious shade of red. "What are you doing? Scabbers, come back!"

Fred shrugged nonchalantly, barely holding back a smirk. "Just trying to stop him from escaping, Ron, but Scabbers is pretty quick for being so fat and old. Don't worry, I'm sure he'll turn up soon."

Ron looked from Fred to George, incredulous, his fists clenching at his sides. "Were those Dungbombs? What if he's hurt? Mum's going to kill you!"

George fought to keep a straight face, ignoring Ron's tirade. They'd debrief with Harry later; for now, they had one very irate little brother to deal with.

—

Hidden beneath his Invisibility Cloak, Harry waited in silence between two suits of armor, his heart steady, every sense honed in on the distant sound of the twins' voices drawing closer. He watched Fred and George lead Ron down the corridor, Ron looking around excitedly, unaware of the trap awaiting him.

As they stopped nearby, Harry took a deep breath, focusing his mind. He would only have a few seconds. George and Fred were confronting Ron about Ginny, their voices just loud enough to ensure Scabbers, cradled in Ron's hand, would catch every word. He watched the rat tense, whiskers twitching in agitation.

Then came the flash of movement as Scabbers bit Ron and tried to escape. Harry's grip tightened on his wand, anticipation coursing through him.

Two soft pops echoed through the corridor as Fred and George's modified Dungbombs exploded in a cloud of invisible knockout gas. Scabbers barely made it a few steps before his movements slowed, his small body growing unsteady. Harry telekinetically summoned the dazed rat with a carefully controlled pull, keeping it low to the ground. He could hear Ron's protests as Scabbers "scurried" away, but the rat's scrabbling against the floor was only an illusion, a marionette pulled by invisible strings of force.

With a final tug, Scabbers slid beneath the Cloak and into Harry's waiting hand, his tiny form slack and limp in his palm. Swiftly, Harry secured the cage he'd prepared, carefully slipping the rat inside and fastening the latch. He glanced back once, making sure the trio was still distracted by Ron's outrage, then slipped away on silent feet, disappearing into the shadows of the corridor.

Making his way through the winding halls, he kept his steps light, his mind already on the next stage of the plan. Reaching the seventh floor, he walked back and forth before the blank wall, focusing on his desired configuration of the Room of Requirement. When the door materialized, he stepped inside.

He had left the prison-trunk he'd created for Pettigrew here, in his duplicate dormitory room. He placed the cage containing the still-unconscious Pettigrew inside the trunk, the Bluebell flame casting an eerie glow over the blades lining the trunk's interior. Each blade glinted in the cold light, a silent threat if the rat was foolish enough to try breaking out.

With a quick murmur, he activated the lock using the passphrase he'd set: "Peter Pettigrew betrayed my parents, not Sirius Black"—spoken in Parseltongue. The lock clicked, now magically sealed, binding the trunk with a layer of protection that went beyond the physical strength of the sturdy materials it was made out of.

Harry stepped back, eyes narrowed as he regarded the locked trunk. Pettigrew would stay contained, with no chance of escape. Now it was time to move on to the next stage of his plan: securing Pettigrew somewhere no one would ever think to look.

Taking a steadying breath, he whispered, "Dobby." With a soft pop, the house-elf appeared, his large eyes bright as he took in the scene.

"Harry Potter, sir!" Dobby whispered, bouncing slightly. "What does Master Harry need?"

"Take me directly to the Chamber of Secrets, Dobby," Harry said, his tone low but resolute. "I need this hidden somewhere it can't be found."

Dobby blinked, his eyes widening with a glint of understanding before he nodded, reaching out his small hand. In the next heartbeat, they vanished, and the damp, cool air of the Chamber filled Harry's senses as they reappeared in its shadowed expanse.

"Thank you, Dobby," he murmured. Dobby gave him a quick, reverent nod and disappeared with another pop, leaving Harry alone with the stone serpents and the ominous silence of the Chamber.

Harry set the trunk down carefully and drew his wand, choosing a spot near the base of one of the enormous stone pillars. Using telekinesis, he lifted up a number of the large flat stones that made up the floor, the mortar long since having eroded away. He then dug a hole with a focused application of more telekinesis, deep enough to bury the trunk.

Harry lowered the trunk into the small pit, then reburied it and replaced the floor stones. Pettigrew would have enough air to last several days in rat form, he estimated—more than enough time to keep him contained until Harry could return and decide his next move.

He brushed his hands off, glancing once more at the hidden burial site, the faintest shadow of satisfaction crossing his features. Vercingetorix hadn't come back out of the statue since their initial meeting—Harry would go and check on him soon, but didn't want to disturb the Basilisk's rest after its long decades of being under the control of Tom Riddle, bound by Dark magic. Time to head back to the twins' secret hideout, for their planned debriefing. He imagined they'd have dealt with Ron by now, one way or another.

—

Fred and George waited in the flickering light of their secret hideout, listening to the quiet tick-tick of the old scavenged clock they'd nailed to the wall. Midnight approached, and George couldn't deny the knot of anticipation in his stomach. They hadn't had a proper debrief with Harry since the capture of Pettigrew, and there was so much left unsaid.

As the clock struck twelve, Harry slipped into the room, punctual to the second. He moved with his usual quiet confidence, his face serious in the dim light as he joined them. George felt a sense of reassurance at Harry's arrival—he looked like he had things under control.

Fred, ever direct, leaned forward. "How did it go with Pettigrew?"

Harry nodded, his expression barely flickering. "He's secure in a place no one would think to look. He'll stay there until we're ready to act on what we know."

George gave a quick nod, relieved to hear it. "And, like you asked, we didn't mention the diary to Ginny." He thought back to her desperate face earlier that evening, but he kept his tone steady. "She has no idea what's happened to it."

Harry's gaze softened, and he gave George a nod. "Thank you. It's best to keep this under wraps for now. We're dealing with Dark magic and secrets that will change how she—and Ron—see the world. Dropping this on them mid-term could be… well, it could be too much."

Fred frowned, folding his arms. "Yeah, but how long are we supposed to keep them in the dark? We're talking about our little sister, Harry."

"I know," Harry said calmly, his tone steady but understanding. "We'll explain everything to them, but it has to be in the right way, at the right time. The truth… it'll be a lot for them. Imagine Ginny knowing that the diary was planted by Lucius Malfoy, and that Pettigrew, the man who betrayed my parents, was hiding under Ron's nose. Letting them know while they're still here, with no time to process… it could do more harm than good."

George exchanged a glance with Fred, both of them wrestling with the discomfort of hiding something so important from their family. But as they thought it through, he could see the sense in Harry's plan. Ginny was already fragile, haunted by the memories of her time with the diary, and Ron would be furious, hurt, maybe even shattered, to learn his pet rat was an accomplice to Voldemort.

Finally, Fred sighed, nodding slowly. "Alright, fair point. Maybe… yeah, maybe it's best to wait. Christmas, at least. They'll have some time to let it settle in then."

George gave a reluctant nod, agreeing. "If we dump all this on them now, it's like dropping a Dungbomb in the middle of a study session—messy and distracting." He met Harry's gaze with a glint of resolve. "We'll wait. But come Christmas, we're sitting them down. They deserve to know the truth."

Harry's gaze was steady, appreciative. "Agreed. And by then, hopefully, we'll have a clearer picture of what we're dealing with—and how to explain it to them in a way that won't turn their world upside down."

With a final nod between them, the three settled back, each feeling the weight of their decision but knowing, in the end, it was the right one.

—

Peter Pettigrew's eyes fluttered open, his mind thick with confusion as he slowly came to. He stretched out instinctively, feeling the cold metal of the small cage around him, and he froze, senses sharpening as the reality of his situation set in. The cage was flimsy, just barely containing his rat form, but beyond it lay something far more sinister.

He took in his surroundings, heart pounding as he realized that he was inside an old oak trunk. Every inch of the trunk's interior—except for the small, cage-sized floor beneath him—was lined with jagged, rusted blades. Broken glass shards, twisted forks, bent knives, and splintered iron rods pointed inward, creating a deadly wall around him. If he tried to transform into his human form, he might break through the flimsy cage, but he'd be impaled from all sides the moment he expanded.

A faint blue flame flickered nearby, casting an eerie glow over the crude but lethal setup. As his beady eyes adjusted, he noticed a small piece of parchment just outside the cage, scrawled with a few sharp words: "No escape, in this form or the other."

Peter's breath came fast and shallow as he huddled into himself, feeling the cold bite of fear. He'd been found, caught somehow. But by whom? His mind raced, frantically piecing together what he knew.

It couldn't be Dumbledore; the old man had been too preoccupied with his school and his grand ideas. And Ron? No, the boy was brave in his own way, but hardly capable of planning something this… ruthless. No, the only name that seemed to fit, the one that sprang to his mind with an unsettling clarity, was Harry Potter.

He'd heard Ron talk endlessly about the boy: how Harry had saved his life in their first year, conjuring up magic so powerful it had trapped a mountain troll without even using a wand. Ron vacillated between awe at the legendary Boy Who Lived, and dismissing it as luck, a burst of accidental magic. Peter knew better. He'd spent every moment of the classes Ravenclaw shared with Gryffindor watching the boy, his curiosity overcoming the shame that had initially caused him to avoid paying attention to the son of the friends he had betrayed. He quickly realized Potter was no pitiable orphan, no ordinary child at all. There was something about him that defied his years, that carried a hint of… danger.

Now, it seemed, that danger had found him.

He shivered, curling tighter in the cage, his small frame trembling as he felt the weight of the trap around him. He was truly trapped, with no way out and no mercy left to expect.

—

In the dim, solitary quiet of his office, Snape sat with his eyes fixed on the oak box before him. The tracking system he had so painstakingly built was, at last, bearing fruit. His initial attempts to follow Harry Potter's movements through the castle had been laughably unsuccessful; Tracking Charms had been detected and removed almost as soon as they were cast, and physical surveillance had proven equally ineffective. The boy was as elusive as his father had once been. Snape suspected that, like James Potter, Harry also possessed an Invisibility Cloak, slipping away unseen at the most opportune times.

Frustration had turned to resolve, and Snape had designed something new—a passive tracking system, one that could monitor Potter's movements without detection. It was built specifically to track only Potter's signature and would remain invisible to even the most acute magical senses. No active charms, no detectable spells. Just a quiet, continuous watch on the boy's every move.

He glanced at the oak box, opened now to reveal the five-by-five grid of enchanted parchments within, each one assigned to a particular section of the castle. Snape's knowledge of Hogwarts ran deep, and he had carefully divided the castle into logical zones, organized in the box by floor, ordered from top to bottom, left to right. It wasn't an exact map of the castle's winding halls and hidden passages, but it didn't need to be. Each parchment held an assigned section, primed to alert him to Potter's presence whenever he passed through.

The system was both simple and complex. He had created a unique ink, carefully brewed from powdered silver, Jobberknoll feather essence, and a touch of dragon's blood to stabilize its magical signature, strong enough to last for years without reapplication. He had used it to inscribe delicate potion lines across the walls and floors of each monitored section, the ink designed to resonate only with Potter's magical signature. Every parchment in the box was inscribed with a stable runic array, an anchor that would record Potter's presence in that specific section and send a signal to the corresponding quill hovering above.

The quills, each linked to a specific parchment, plotted Potter's movements in real-time, the ink forming small, faint dots on the parchment wherever the boy was detected. Over weeks of tracking, a pattern had begun to emerge. There was no self-resetting charm; Snape had made certain to leave the dots undisturbed, letting the patterns build so he could analyze them as they developed. He would wipe the parchments only when necessary, clearing the data manually with a spell. This way, he could observe Potter's behavior over time, every step preserved until Snape chose otherwise.

Snape leaned over the box, his eyes narrowing as he took in the faint patterns on each parchment. It didn't take long to see the clusters—the patterns of behavior that Potter seemed to fall into.

Down by the bottom of the grid, one of the seventh floor parchments, in particular, drew his attention. Potter had been moving in and out of the same stretch of corridor repeatedly, always near that ridiculous painting of the dancing trolls. The corridor itself was empty, containing nothing of obvious interest, certainly nothing that merited the boy's frequent visits. It was as if Potter were checking something there, again and again, searching for something or ensuring its safety. Snape had heard no reports of trouble on the seventh floor, but Potter's attention to that area was far from ordinary.

He frowned, moving his gaze up to the second row of parchments. One of them, representing the area near the girls' bathroom haunted by Moaning Myrtle, showed similar clusters. For reasons Snape could not fathom, Potter had visited this bathroom multiple times. The location was strange, even by Hogwarts standards—students avoided that bathroom if they could help it, mostly due to the constant wailing of Myrtle herself. Yet Potter had been there on more than a few occasions, enough to form an unmistakable pattern of repeated visits. What could he possibly want there?

"Interesting," he murmured, his voice barely more than a whisper. The corridor near the trolls and the bathroom haunted by Myrtle—two entirely unrelated locations, and yet, in Potter's world, they seemed to be linked. Was there a passage there he was unaware of? Had Potter found some hidden door, or worse, uncovered something dangerous? If there was even a hint of danger, Snape intended to find it first.

He considered his options. The seventh floor corridor would be simple enough to inspect under the guise of a routine patrol. The girls' bathroom, however, would require more care. He would need to bide his time, wait until Potter next visited, and perhaps observe from a distance. He had no intention of raising the boy's suspicions by questioning him outright.

With a flick of his wand, Snape performed a precise, deliberate spell over the parchments. Each inked dot faded, leaving the parchments blank and ready to capture the next cycle of tracking. He closed the lid of the oak box, locked it with a flick of his wand, and hurried out of his office.

Torchlight flickered across the empty seventh floor corridor as Snape paced along its length, his eyes narrowed, studying every inch of stone and shadow. The corridor was silent, flanked by walls bare of anything but that ridiculous painting of the dancing trolls, but he knew Potter had been here time and again. For what reason, Snape couldn't yet fathom, but there had to be a passage hidden somewhere, some way to reach the second floor—a hidden corridor Potter was somehow aware of.

As he moved back and forth, examining each stone, he felt a surge of impatience. But then, suddenly, the air shifted. He stopped, his gaze snapping to a door that hadn't been there a moment before. A plain, unassuming door, as if it had always belonged in that empty stretch of wall. His eyes gleamed with satisfaction; finally, he had found Potter's secret.

Snape reached for the handle and pulled the door open, revealing a narrow wooden staircase winding downward into darkness. Without hesitation, he stepped inside, his feet moving swiftly down the creaking steps, his wand drawn. The air grew cooler as he descended, the smell of damp stone and faint mildew filling the stairwell. The walls were smooth, almost unnatural in their lack of detail—a stark contrast to the rough-hewn walls of Hogwarts' usual hidden passages.

Snape reached the bottom of the staircase and pushed open the door in front of him. He found himself exactly where he had anticipated—on the second floor, just outside Moaning Myrtle's bathroom. A flicker of satisfaction crossed his face. Potter's secret passage had led him directly to this spot, which made it clear: whatever the boy was doing involved both this corridor on the seventh floor and Myrtle's abandoned bathroom.

He glanced back to see the door slowly vanishing, blending seamlessly into the stone wall until it was no longer there. Frowning, he stepped forward and tried to summon it again, but nothing happened. The wall remained blank, as if the door had never existed.

A one-way passage. But why would Potter be so enamored of a route that only worked in one direction? Was he using it as an escape route, a quick descent from the seventh floor to avoid detection? Or was there something hidden within the passage itself that held his interest? Whatever it was, Snape was certain he would uncover it soon enough.

The faint sound of water dripping echoed from within Myrtle's bathroom, and Snape moved forward, his footsteps silent, his wand at the ready. He would find out precisely what Potter was up to, and this time, he wouldn't be thwarted by a simple Invisibility Cloak or half-learned spellwork. The boy had secrets, but he would uncover them, one by one.