The three Lions meet in The Common Room when they were sure that everyone else has gone to bed.
"How are we going to get past the Fat Lady?" Asked Hermione.
"To be honest, I haven't really thought that far." Harry said, then he recoiled at Hermione's glare. "D-Do portraits even sleep?"
"They don't." Neville said, grabbing their attention. "Once I was having a detention with Snap and he let me off pretty late. Thought that she was asleep, but as soon as I said the password, she opened up right away."
"Great. Let's go." Said Harry, throwing The Cloak over the three of them. They opened the door and quickly made their way out.
"Whose there?" Said The Fat Lady, wildly looking around as she closed the door. Then she sighed. "The Weasley Twins. Jinxing my hings so I would think that there are students out of bed and warn Filch like last year. They'd do anything for a laugh, wouldn't they? Well, not this time!" The Trio sighed in relief, silently thanking The Weasley Twins.
Once they were sure that they'er out of The Fat Lady's earshot, they broke into a mad dash for the great hall, where Draco was waiting.
Draco was waiting for them by the door, constantly looking from right to left, to right again as if he was expecting Filch to turn up any moment, which was justifiable.
"Draco!" Hermione whisper-yelled, which made him jump a foot in the air.
"It's us!" Harry said, opening The Cloak just a little to show Draco their faces.
"Will The Cloak be able to cover all of us?" Asked Draco.
"It's going to be a tight fit, but I think we can all squeeze in."
Draco reluctantly ducked under The Cloak, and, Harry was right, it was tight, But they weren't able to squeeze in. All their feet were visible up to the knees, Harry's and Neville's torsos (who were in the middle) were not that well hidden, and Hermione's hair was sticking out.
Suddenly, The Cloak -as if it was able to sense their struggle- expanded, giving the quartered enough room to cover themselves.
"Now that was unexpected." Said Neville, once they all stopped struggling.
"Can Invisibility Cloaks even do that?" Asked Hermione.
"Not that I know of." Answered Draco. "My Father used to have an Invisibility Cloak, too, but it never done that when he tried. In fact, it split in half."
"A Charm maybe?" Asked Neville.
"I doubt it." This time, Hermione answered. "Harry said that it used to belong to his father. I don't think a simple Charm would last that long." Then with a thoughtful look, she added. "I think I'm going to research Invisibility Cloaks once we're done."
"I'm sure you would." Harry said. "Let's go."
They made their way through hallways and corridors, on their way to third floor. They managed to bypass Filch at some point, though it took them almost suffocating from holding their breath for so long.
"Uhh... Guys..." Said Draco, when they were (finally) on the third floor.
"We're almost there, Draco." Said Harry.
"N-No, not that. L-Look at this." They all turned to see what he was pointing at to see...
"Mrs. Norris?" Neville said.
"Sh-She's been following us for the past five minuets n-now. It's starting to creep me out."
"Maybe it's just a coincidence." Said Hermione. "It's not like she can see us." But when they moved, she moved with them. When they stopped, she stopped with them, all while keeping her eyes fixed on them. "Or maybe she can."
"Mrs. Norris?" Came Filch's voice as he appeared from a corner. "What is it? Students out of bed?" The cat meowed, eyes still fixed on them. "Sniff around, My Sweet, they must be here somewhere."
"Come on!" Harry said. They moved as fast as they could without making much noise, but Mrs. Norris was still after them and so was Filch. They turned a corner. Then another. Then another. Then...
"You don't want me as your enemy, Quirrell."
... They ran into Snap... Confronting Quirrell?
Though they didn't have time to question the situation, because Filch was still hot on their tails.
"Aha!" Said Filch. Though his triumph turned to disappointment when he saw that they weren't students (not that he could see, that is).
"What is it, Filch?" Said Snap, sounding quite irritated though his voice remained calm and collected. "Can't you see I'm in the middle of a delicate matter?"
"Students out of bed, Professor!" Answered Filch. Snap turned suddenly, starring right at them as if he could see them.
"It must be that arrogant Potter. Seeking out past curfew." He said.
"Run?" Whispered Neville to the others.
"Run." Hermione confirmed. And run they did. Just in time to see Snap grasping the air when they were standing not a second ago.
"Don't let them get away!" They heard Snap shout.
"In here!" Harry said, pointing to a big wooden door. But when he tried to open it, he found that it was locked.
"Move over!" Said Hermione. Then after she shoved him out of the way and accidentally kneeing him in the stomach (Sorry, Harry!), she pointed her wand at the knob and said "Alohomora!"
They entered the room, taking off The Cloak just enough to uncover their heads so they could breath. "We... made it..!" Panted Harry.
"N-Not... E-E-Exactly..." Neville whimpered. Draco, Hermione, and Harry turned to see what he's looking at to find a head... two...three...heads staring right at them. And they did not look friendly.
They screamed as The Cerberus growled at them. Scrambling to get The Cloak fully back on, they darted out of the room, closed the door, and locked it just as they heard a great thumb coming from the other side.
"I heard screaming! Potter must be this way! And it looks like he's got friends." Said Snap from far off.
"Oh no!" Said Hermione. "We're going to get busted!"
Harry, who was desperate to find a way out, shouted "This way!" pointing to another locked door. After performing another 'Alohomora', they scrambled through and closed the door behind them...
...Only to come face to face with Albus Dumbledore...
...Shit...
Author's note: People have been saying in the reviews that I skipped a lot of scenes in my story. Well, I didn't. I only skipped one scene: Christmas presents. I can't really fit it into the plot, and I think everybody knows how Harry got his Cloak. As for the rest, they'll come eventually, just in different order. You didn't really expect everything to move along the same way without Ron, did you? That's literally Time Travel 101! You change something from the past, almost nothing in the future is the same! Just look at 'The Cursed Child' for instance!