A/N: This chapter is rated PG for sword-fighting practice. And a teensy kiss? :)

OoOoOoOoOoOoO

VI

ANNABETH

Annabeth turned the page of the book in front of her. The first sentence on the new page didn't make any sense. A few seconds later, she turned back to the previous page, realising that she hadn't really taken any of it in. If only the book was in Greek. It would have made reading so much easier. Then again, at least Latin was better than English.

She wasn't sure how long she'd been in the library already; long enough that the words were beginning to blur before her eyes.

She'd begged Reyna to get her a pass to the senate library—the greatest treasure trove of knowledge that New Rome had to offer—and since receiving it, she'd spent practically every waking hour here, waiting by the entrance at opening time and leaving only when the custodian chased her out at night. She'd cut classes and even missed an assignment deadline, but she didn't care. She could catch up on stuff she missed at school, retake the module next semester if need be.

But if she didn't find a solution to help Percy…

Everyone had a different opinion about it. Jason's advice was to give him space, that telling Percy too much would just overwhelm him. He'd told Annabeth about the confusion he'd felt when he'd awoken on the Wilderness School bus with everyone having Mist-induced false memories about him.

'Everyone was trying to push these memories on me and I knew it didn't feel right. It was especially hard with Piper expecting something from me. Even though I liked her, I just couldn't let myself get close to her.'

It was sensible advice and Annabeth was trying to follow it, trying not to push too much on Percy too soon. It wasn't easy, though, when everything she said or did was so entwined with him. She hadn't even realised how automatically she filled in his sentences, or referenced things they'd done together. Not until he winced or pulled away every time she did it.

Frank thought showing Percy places that had been important to him would make an impact, but so far none of their regular haunts in New Rome had jogged Percy's memory. Hazel felt he needed to get back into a routine and she'd gotten him back at the university, except he'd completely overhauled his course load. Piper thought they should just have faith that Percy's memories would eventually return on their own, but the thought of waiting, doing nothing, was simply untenable. Annabeth had even contacted Chiron, who had warned her that it was possible Percy would never remember the past.

'Maybe it would be better to forge a new future,' her old mentor told her gently.

But Annabeth couldn't let it be. Beyond how badly it hurt when Percy looked at her like she was a stranger, the clincher was the Iris-message conversation they'd had with his family a few days ago. The way he'd recoiled when Tyson had appeared in the rainbow, making the big guy's eye well up with tears; the brave look on Sally's face that barely masked the pain when her son didn't recognise her.

Annabeth had promised Sally she would fix it, and she was determined to do so.

After all, it had been her fault: Percy had gotten in the way of an attack on her. And it was her nepenthe recipe that had gotten him lost and captured by that damn empousa.

Annabeth fingered the bronze pendant in her pocket, a spoil of war she'd ended up with after she'd stabbed the empousa in Phoenix. She had no logical use for it, but she'd kept it for some reason. She kept carrying it with her like it might point her to an answer.

So far, it hadn't.

A shadow fell over her, blocking the light. Annabeth looked up to see Reyna standing before her, concern stamped across her face.

'Annabeth, you need a break.'

'I need to find an answer,' Annabeth insisted.

Reyna shook her head and put her hands on the book, covering the page Annabeth was trying to read. 'I bet you aren't even absorbing whatever you're reading any more.'

Annabeth wanted to protest, but Reyna was right. She'd read the paragraph on the page at least three times and she still couldn't say what it was about.

'Lay off the research for the afternoon,' Reyna said. 'Come have coffee with me.' When Annabeth didn't agree right away, Reyna raised her eyebrows. 'Don't forget who got you your library pass.'

Annabeth raised her hands in surrender and let Reyna march her out into the bright sunshine.

OoOoO

If there was one thing cafés in New Rome did well, it was coffee. But Annabeth barely tasted hers that afternoon.

'Earth to Annabeth,' Reyna said, waving a hand in front of her.

'Huh?' Annabeth sat her cup down in its saucer.

'You're still thinking about Percy, aren't you? You seriously need to get your mind off him. I know what it's like to get too focused on a problem. You'll just end up going in circles around it.'

'I can't help it,' Annabeth said. 'You don't know how awful it is. It's like, when we pass each other in the apartment, he can't even look at me. And I know he wants his memories back, but he needs it to come from himself, not from us. He doesn't even trust me any more.' Her voice cracked on the last sentence. This was it, the real reason she couldn't just let things be and start again from scratch with Percy.

He wasn't starting from a clean slate. That damn empousa had fed him a pack of lies and now the sum of his experience was being lied to and tricked. It was no wonder he was suspicious of everything anyone said to him. She would have been, in his position. But it also meant that one of his most endearing qualities, the one that annoyed her no end sometimes, but which she still loved so much about him, had been lost.

Percy was the kid who had trusted Tyson and Bob the Titan and seen the best in them. The man who was willing to give people the benefit of the doubt, a chance to prove themselves. Seeing him look at everyone now like they were his enemy unless proven otherwise—it broke her heart.

'I worry that if we don't fix this, he won't be Percy any more. He'll be…I don't know. Perseus. This bitter guy who thinks the world is out to get him.' Her breath hitched as she said it, remembering another friend whom she had lost that way.

Would Percy become like Luke—cold, bitter, and angry? She knew Percy held the same potential for darkness inside of him. She'd seen glimpses of it before. But his faith in others had always overpowered his dark side.

'He's in one of my classes, you know,' Reyna said. 'Greek mythology.'

'Seriously?'

'Yeah. It's a rubbish class—I took it thinking it'd be good to know more, what with the exchange programme and stuff, but the lecturer's crap. I was going to drop it, but now that Percy's in it, maybe I'll stick around and keep an eye on him.'

'Would you?'

'Sure. Though I don't think he trusts me any more than you. The first day he came to class, he saw me but he went straight to the other side of the room. I guess he thought I was trouble.' Reyna's mouth twisted in a wry smile. 'He still has good instincts.'

Annabeth managed a short laugh. 'Still, at least you can see how he's doing. it's hard for me to keep tabs on him while trying to give him space at the same time. I really want to know how he's coping with everything, but I'm starting to feel like a stalker every time I check up on him.'

They finished their coffee and Annabeth noticed for the first time that hers tasted off. 'There was milk in this,' she said, frowning.

Reyna laughed. 'You took my latte by accident and you didn't even realise.'

'Oh my gods, I'm sorry!'

'It's fine. Looks like you need more than just a coffee break. I was thinking of going to the sword-fighting arena for some practice. You should come. I could do with a decent sparring partner.'

Annabeth traced the rim of her coffee cup. 'I don't know. I should get back to the—'

'If you say library, I'm going to deck you. When was the last time you got some practice in?'

'Well, I didn't have any phys ed credits this term because I couldn't squeeze them in with all my electives, so Percy and I were just keeping up practice on our own. Except the last two weeks, he's been…'

Reyna nodded. 'You're definitely coming with me, then.'

OoOoO

There was a class going on that afternoon so the sword-fighting arena was crowded with students doing practice rounds with wooden swords, but there was one field free. Annabeth and Reyna claimed it and started with a warm-up round, sparring lightly with no serious attempt at attack, just getting into the rhythm of things. Annabeth's drakon-bone sword met Reyna's Imperial gold blade with a satisfying clang. Her focus narrowed to her footwork, her thrusts, and the movements of her opponent. She let her instincts take over, pushing her worries and stress out of her mind.

Reyna was right. She needed this release.

'Ready to go?' Reyna asked.

Annabeth nodded, looking forward to the match now. Sparring with Reyna was always a challenge since they were usually quite well-matched, having both been one of the best their respective camps had to offer.

Just as they took their positions, Annabeth happened to glance over at the other students. The instructor had evidently directed their attention towards Annabeth and Reyna, probably using them as a handy demonstration. Annabeth's eyes travelled over the gathered students and her gaze fell on a thin face framed with the shock of black hair that she would know anywhere.

Percy was here.

Reyna's blow almost caught her unawares. Annabeth parried at the last minute and nearly stumbled, her footwork clumsy in her distraction. She heard gasps from the watching students and gritted her teeth, angry at her own lapse in concentration. She threw herself back into the fight, but Reyna was too skilled for her to overcome such an egregious early error. She went down embarrassingly quickly.

To her credit, Reyna didn't talk down to her with a 'good one!' or any display of sympathy. 'Come on, Chase,' she said, 'that was rubbish.'

'Sorry,' Annabeth said. 'Again?'

They exchanged positions and bowed. This time, Annabeth threw herself into the match, pushing Percy out of her mind completely. She used every battle reflex she possessed, cataloguing Reyna's approach and strike style, matching every blow with her own thrusts and parries. Her footwork was quick and steady. About a minute in, she found her opening and struck at the base of Reyna's sword, using a twist that Luke had taught her a long time ago.

The Imperial gold weapon clattered out of Reyna's hand. Annabeth lunged forward and pressed the point of her sword to Reyna's chest.

'Yield!'

Reyna raised her hands in surrender. Annabeth withdrew her sword. She was breathing hard and sweating, but her head no longer felt tight and tense.

There was a smattering of applause from the watching students and their instructor. They dispersed to the other fields to practice, but Percy hung back. He had a speculative look on his face, his eyes scrunched up as they always did when he was contemplating something. She thought for a second—hoped, maybe—that he might come forward to speak to them, but then he retreated and re-joined his group.

It stung, but there was something else about it. Something in the way he looked at her jogged a distant memory—thirteen-year-old Percy scrunching up his face in concentration as he tried to learn something she was teaching him. Constellations, maybe? No, planets—she'd been teaching him a mnemonic to put them in order: My Very Educated Mother Just Served Us Nine Pizzas.

'I can definitely remember that one,' Percy had said. 'I just have to remember that there's nine of them.'

'Well, think of it this way: it's a mnemonic, and Mnemosyne gave birth to the nine Muses,' she'd told him.

One of the passages she'd read in the library earlier drifted into her mind: Asclepius and Mnemosyne were often linked in prayer, invoking the process of memory in healing.

Mnemosyne, the Titaness of memory. Wasn't there a myth about her pool in Hades? Something about drinking from two springs at the same time…

'Oh my gods,' Annabeth said.

'What?' Reyna asked.

'I know where to look. The answer was at home all along.'

'What are you talking about?'

'The nepenthe—the potion we made for Percy. There must have been a missing ingredient, but I didn't realise, because it was from a different source! Reyna—thank you. You were right, this helped. But I need to go now.'

She had to find Nico di Angelo.

OoOoO

Annabeth pulled on her jacket. It was a warm night, especially for October, but she expected the Underworld might be chilly. Maybe. It had been a long time since she'd been there.

Unless you counted Tartarus, which she didn't. Anyone who'd been there could testify that it was a whole different realm from Hades's kingdom.

Hope had been fluttering like a wild bird in her chest since Nico had agreed to take her. She'd pulled out every source she could find on the Mnemosyne—some said it was a pool; others a spring, or a river—and there was even an entire religion based upon it. Although she hadn't managed to connect it definitively to the nepenthe, that recipe had been a closely guarded secret. It made sense that Helen of Troy hadn't penned all the ingredients—maybe she'd even left out the key one to mislead others.

She wondered if she should tell Percy what she was doing. She didn't want to get his hopes up, though. Maybe after they visited Mnemosyne, if they got their answers, if it really worked…well, they'd have to get him to drink it, ultimately. Would he trust them enough to try?

But she'd worry about that later, after they succeeded.

Just as she was about to leave the apartment, Percy emerged from his room.

'Annabeth?'

She blinked in surprise. It was the last thing she'd expected. Percy hadn't initiated a conversation with her since they'd brought him back from Arizona.

'Um,' she said stupidly. 'Yeah?'

'I was, er…' His face scrunched up again, making a familiar crease in his forehead. Annabeth resisted the urge to reach out and smooth it with her thumb. 'I saw you fighting today.'

'Oh.' Annabeth wasn't sure how to respond. Should she mention that she had noticed him?

'You're really good.'

'Thanks. You're actually not bad yourself.' The words came out before she could bite them back. She winced. Once again, she'd dropped more information about him—information he'd been solidly rejecting when it came from her.

Percy ignored her slip, though. 'Um, I have a favour to ask.' He reached into his pocket and brought out a pen she knew well.

Riptide. She hadn't seen it since the fight with Hipponoe.

Percy fiddled with the cap, but didn't flick it off. Probably a good thing. Terminus had long since given up on making Percy deposit it at the city boundaries—nothing really stopped it from reforming in his pocket—but he'd come down harder than Zeus's master bolt if he caught Percy uncapping it inside the Pomerian line. 'I thought maybe you could teach me how to use a sword.'

'Oh,' Annabeth said again. Her heart, already aflutter with hope at finding a cure for Percy's memory loss, went completely insane.

'Look, you don't have to if you don't want to,' Percy said quickly. 'It's just that, I wasn't really getting much from my class today, and I thought I might as well make the most of living with a real sword-fighting pro.'

'No, I mean, yes, I can teach you.' She tried not to sound too eager. 'Tomorrow?'

'Cool,' he said. 'Um. Later, then.'

Annabeth smiled. 'See you later, Percy.'

It wasn't until she got to the barracks to meet Nico that she realised it was the first time he hadn't corrected her for calling him Percy instead of Perseus.

Warmth spread from her heart throughout her chest. It was a step.

OoOoO

'I hope this works,' said Nico, squinting at the cave system on the western edge of the Underworld. 'Percy's weird as Perseus.'

'I hope so, too.'

'I think that's the one,' he said, pointing. Annabeth couldn't see how this particular cave was different from the others, but Nico probably knew best. They approached the entrance, carved into the dark volcanic rock. The temperature dipped ten degrees when they crossed the threshold. Annabeth shivered, glad she'd thought to bring her jacket.

The pool lay in a round depression at the centre of the cave. At its edge was a series of altars, ten in total, all made of pure white marble and each bearing a flame. Their flickering light danced over the surface of the pool, creating shadows that shifted continuously in its depths. The middle altar was the highest, shaped like a jagged mountaintop. The others each bore a different carved symbol: a writing tablet, a flute, a lyre, a wreath of myrtle. At the second-last altar, represented by a bugle, a girl wearing a Greek chiton, laced boots, and an ivy wreath in her wispy hair was tending the fire.

'Mnemosyne?' Annabeth asked.

'Great Olympus, no!' said the girl, shuddering. 'Please don't mistake me for my mom. That's like, gross.'

'Sorry. You must be—'

She turned to them with an impish look on her round face. 'Thalia. Muse of comedy, at your service. Are either of you looking for a good laugh?'

'Not particularly,' Nico said. 'We're looking for your mother.'

'What do you want with her? Seriously, she's boring. And old.'

'Aren't you like three thousand years old?' Annabeth pointed out.

'Yeah, but mom's three thousand and thirty.'

'Thalia!' Mnemosyne emerged, sliding out of a crevice in the cave wall that Annabeth hadn't even noticed. 'I should snip off your disrespectful tongue.'

Thalia poked the offending appendage at her mother. Mnemosyne crossed her arms and stared at Annabeth and Nico. Unlike her plump daughter, she was tall and thin, with thick bronze hair. Her expression was the very definition of resting bitch face: grumpy pursed lips and bored-looking eyes.

'Son of Hades,' she noted, 'and a daughter of Athena. Well, what do you need to remember?'

'How did you know—'

Mnemosyne rolled her eyes. 'Everyone who comes here wants to remember something. That's all anyone prays to me for now. Time was, I'd get sacrifices for poetry and healing and clarity of vision, but noooo, now it's just "Mnemosyne, I need to remember where I put my keys," or "Mnemosyne, can you come up with a good way to memorise the periodic table?"'

'Well, you did let Calliope and Erato handle the poets,' Thalia said.

'I know that!' Mnemosyne snapped. 'I remember.'

'We're here for healing,' Annabeth said quickly. 'I know about your collaboration with Asclepius. The ancient Greeks prayed to both of you together.'

'Those were the days,' Mnemosyne agreed. 'What is it you need, then?'

'Your pool—we were hoping it would bring back lost memories.'

'Lost memories, huh?' Mnemosyne glided over to the edge of her pool. She put one finger in it and stirred the waters. The surface rippled and Annabeth saw, to her surprise, her father peering down at a baby in a golden basket. Mnemosyne stirred again and the image changed to a young Nico running hand-in-hand across a cobblestone path with an olive-skinned girl—his sister, Bianca. Nico paled and swallowed hard.

'Which one of you is searching, then?' Mnemosyne asked.

'Neither,' Annabeth said. She explained about Percy and his predicament. Mnemosyne's expression didn't change, but her eyes seemed slightly sadder.

'And you heard about the pool's power to recover memories,' Mnemosyne said. 'It's not untrue, but there's a procedure to follow.'

'Well, whatever it is, we can do it!'

Mnemosyne shook her head. 'You don't understand. This is a pool, not a river. It does not mingle with the waters of the Lethe. The only way to use my pool to retrieve memories that the Lethe has taken is to drink from it before you drink from the Lethe.'

Annabeth's heart plummeted to her knees. 'Surely there's something you can do?'

Thalia clasped her hands together. 'Come on, Mom, her story's so tragic. Let's make it happier.'

'He drank Lethe mixed with nectar,' Nico added. 'Would that change anything?'

Mnemosyne considered this for a moment. It would be better if he had drank Lethe mixed with water from the spring of memory. But perhaps…' She crossed to the centre altar and placed her hand over the burning flame. After a few seconds, a small vial materialised in it. Mnemosyne plucked it out of the fire and brought it over to Annabeth and Nico.

'This is the most purified of my pool's waters,' she said. 'Mix two parts with one part nectar and let it steep for three days. That's the most potent cure I can offer. Perhaps if your friend's memories have not yet flowed all the way to Chaos, it may work.'

Annabeth clasped the vial to her heart. 'Thank you,' she said fervently.

'Yes, well, it's nice to be asked for something more meaningful these days. One does get sick of all the prayers about rote memorisation…' She shuddered. 'Thalia, did you remember to clean your altar?'

With the abrupt change in subject, Annabeth guessed she and Nico were dismissed. As they left the cave, she heard Thalia complaining, 'Yes, mom, stop nagging.'

'Well, remember that century you neglected it?'

'Mom, that was millennia ago! And besides, Melpomene said she'd cover for me.'

'And you saw what happened—all the Greeks ever wrote from that era was tragedy.'

'I'm going to take it as a good sign that we ran into the Muse of comedy instead of the Muse of tragedy,' Nico commented.

Annabeth laughed. 'Thanks, Nico. Let's hope this works.'

OoOoO

Even without Mnemosyne's potion, things were already looking up. Percy seemed to take their agreement to practise sword-fighting as a peace offering, and their interactions at home were less stilted. He wasn't exactly opening up to Annabeth yet, but he did appear in the common areas more often, helping himself to the big pot of coffee she made in the morning and even popping into the living room for a short chat one evening when she was eating pizza and catching up on the assignments she'd neglected. They didn't speak of anything significant, just inane small talk about his day, but the fact that he'd sought her out and started the conversation…

She started to realise that the less she offered him, the more willing he was to approach her instead.

Their lessons began the day after her return from Mnemosyne's pool. Annabeth quickly realised that while Percy's memory of using Riptide was gone, his skill with the sword remained. And his natural fighting style was Greek. No wonder he hadn't felt comfortable with the Roman instructor's teaching.

By their second day of training, Annabeth was already starting to feel challenged sparring with Percy. Every move she'd shown him, he'd picked up with ease. It didn't take an afternoon for him to move past competency to proficiency.

On the third day, Mnemosyne's potion was ready.

They both had class in the afternoon, so they'd agreed to have their lesson in the morning. Percy came down to the kitchen looking a little bleary-eyed and poured himself a mug of coffee. He took a gulp and made a face.

'Out of milk today?'

'Oh, sorry,' she said. 'I did it the usual way.'

'The usual way?'

'I like my coffee black,' she explained.

'But you've been making it with milk…' His face closed off, and Annabeth realised her mistake. She'd been making him coffee the way he liked it—the way she knew he liked it.

It didn't seem to matter how many concessions she consciously made—removing her stuff from his room, letting him make the first move, even taking off her camp necklace so he wouldn't see something they shared—she'd more easily cut off her own arm than succeed at cutting Percy out of her soul.

'Perseus,' she said, hoping the use of the name he favoured now would signal a compromise. 'Before we go for training, I need to tell you something.'

His expression was guarded. 'What is it?'

Annabeth explained about her and Nico's visit to Mnemosyne and the potion they'd made from the pool.

'It might be what you need to bring your memories back. Your memories, not something we've told you or what the empousa planted in your head.'

'A drink,' he said. And then, more wistfully, 'My memories.'

'It might not work,' Annabeth warned him, although she was banking everything on its success. 'Mnemosyne said that if your memories have gone out to Chaos, they're really gone. But this was the most potent memory cure she could give us. I—I hope you'll try it.'

A deep crease appeared between Percy's eyebrows. 'You're not gonna make me drink it?'

'They're your memories, aren't they?' Annabeth said in surprise. 'It's your decision.'

Percy looked her in the eye, a long searching gaze. Finally, he said, 'Okay, what the heck. Let's try this thing.'

Annabeth's heart pounded as she passed him the flask where they'd mixed Mnemosyne's potion. After taking a deep breath, Percy downed it in one gulp.

They waited thirty seconds, a minute, two. The air hung heavy in the room, weighted with expectation. Annabeth's hope was like a balloon, rising slowly through its density. Any moment now…

Then Percy said, 'I don't feel any different.'

'Do you remember—?'

'No,' he said bitterly. 'Nothing.'

Annabeth's balloon of hope exploded into hot, stinging disappointment that coursed miserably through her veins. Tears pricked at her eyes, but she made herself hold them back. If Percy was still Perseus—and it seemed like he would be from now on—the worst thing she could do was show how much it affected her.

'I'm sorry,' she said. 'I really hoped it would help.'

In the silence, Annabeth wondered what he was thinking. If it had been her Percy, she would have guessed that he was worrying about how she felt about it. But Perseus was different—and he didn't care about her.

At last he said, 'It was worth a shot.' He gave her a tentative smile. 'Thanks for trying.'

Annabeth nodded. 'Well,' she said, casting about for a change of subject, 'I can still teach you swordplay.'

Percy seemed to throw everything he had into the lesson that day. He mastered each move nearly as quickly as she could demonstrate it. When they got to their end-of-session match, it was like fighting Reyna, except harder. With Reyna, if Annabeth could recognise the pattern and style she was using, she could anticipate her opponent's moves and counter them. Percy fought the way he always had: with a wild unpredictability that took all of Annabeth's best reflexes to meet.

It thrilled her. This was the way they had always sparred, a dance that kept her continually on her toes. It was the duel they'd repeated time and again since they were kids at Camp Half-Blood, a familiar tango that, truth be hold, was a huge turn-on for her. Percy's green eyes were alert and bright, his face so alive as he slashed and struck and countered and parried. He wasn't even fighting using her instructions any more, but with his own instincts.

It ended when she attempted a tricky move and messed it up. She fell back as he knocked her sword out of her hand. Her feet caught Percy's as she went down. He landed on top of her, pinning her to the ground in an unorthodox victory.

'I think I win,' Percy said.

His hair was completely mussed up, his bangs plastered across his sweaty forehead. His eyes sparkled with exhilaration. His face was flushed and he was breathing heavily, but his mouth quirked in a familiar sardonic smile, with that one lopsided dimple denting his right cheek.

This was her Percy. Memory or no memory, he was still in there.

Annabeth couldn't help herself. She reached up and kissed him.

OoOoOoOoOoOoO

A/N: Yes, a cliffy. Yes, I'm evil. In the meantime, check out preciouschildrenofolympus's illustration of The Kiss! (preciouschildrenofolympus . tumblr post / 164173896410 / heres-the-first-half-of-my-art-for-the-pjo-big).

So Reyna basically walked straight into this chapter and wrote herself in. With that coffee scene (and the one with Percy later), some of you may know since I mentioned it before, but I totally have a coffee backstory for all the demigods. I'm nuts, I know. I think I've mentioned this before if you've read my other story, The Golden Fleece, but for those of you who haven't, here's the question again: What drinks do y'all think the seven (and others) would favour?

I'll also have you know that the bit about Mnemosyne was written before TDP came out. I only went back to make some small edits it to make it more compatible. And yes, she does have a daughter—one of the Muses—named Thalia.

Thanks again to my readers for checking this out! I love hearing what you thought, so do drop by and say hi if you're reading … comment box is just down there … and I try to be good about replying to comments!

To CupcakeQueen816, thanks for your last comment, and good luck with your new school! Of course that's the important thing, and stories online will always be here waiting anyway. ;) This fic should be about 22 chapters in total. As for the next DoW fic, it's getting written! I'm almost done with the first draft (which is utter crap that needs a load of editing, but at least it actually exists now) and my aim is to work on it over the next few months and (fingers crossed) be ready to start posting the beginning chapters when I finish putting up this story.