This is going to be a pirate AU, because the idea just shoved its way into my head, pushing all my other inspirations out the window.

IMPORTANT NOTE: This is not a Lercy fic, the main pairing is probably still Percabeth, it just kind of felt right to start off with Percy and Luke, but it's friendship only between those two. Luke is probably going to be a good guy in this fic.

Disclaimer: Percy Jackson and crew does not belong to me, but instead belongs to Rick Riordan. I only own the plot.

Prologue: 7 years ago

Luke swiped his arm across his face furiously, wiping away the burning hot tears that had somehow worked their way out his eyes. They still clung to his eyelashes, breaking the world into shattered, glittery coloured pieces. As Luke tried to blink them away, he dropped onto the soft sand, frustrated and defeated, salty grit finding its way under his fingernails already.

Luke wasn't sure how exactly he had found himself here, at the shore of the Mediterranean Sea, but then again, the blind fury that he stormed out of his father's palace hadn't exactly left him calm and reasonable. He had just ran as fast as his legs could carry him, enough to escape the guards; and before he knew it, he was here, watching grey waves roll and crash like thunder, sending sea spray flinging through the air. The sea was restless today, unlike its usual relatively calm surface. Luke could feel something stirring under the water, something menacing in the way the water swirled. In a way, it was kind of mesmerising. A huge storm was coming, and Luke could almost feel the pressure in the air, and more moisture than usual sinking in his pores that usual.

Today was supposed to be a good day, it was his ninth birthday. And it was the day Luke got himself betrothed. He was so mad that his father had presented him with a future-to-be bride to him, as if she was a birthday present. He had wanted toys for his birthday, and that epic book that the other boys were always talking about. Definitely not a girl. Apparently, as the son of King Hermes, he had no right to choose the person that he would marry, and he had a responsibility for the kingdom, to make connections to other realms. That's what his dad always said, and the words had become engraved in Luke's head over time. It's not that Luke hated - or even disliked- the girl that his father had chosen. But he had just always wanted to make his own choices, have his own opinion, and live his own life. He wanted to be free.

Staring miserably at the dark, damp sand in front of him, Luke could almost picture his father speaking the words that he had repeated over and over, time and time again. They rang as clear as bells in his memory. 'You're a Castellan Luke, do you remember what our last name means? It means guardian of a castle. And what better way to be a guardian of a castle, than to be a king?' Luke's nine-year-old mind understood, he just didn't realise he needed to marry whoever his father wanted him to marry, to be a good king. The whole thing just frustrated and confused him.

Glancing up, Luke noticed that the tide was drawing nearer, and the tips of his shoes were almost scraping the water. He tried to remember the lectures that his tutor had given to him about the ocean and the way it got more and less sometimes, but he obviously hadn't been concentrating very hard in that session. The ocean had always been mysterious to him, and he was wary of the waves that lapped closer and closer.

Luke stood up to avoid getting wet, and walked along the sea. Maybe he could find a rock to sit on or something, because going back to the castle right now would be a very bad thing. Just as he thought this, he spotted a few flat looking rocks in the distance that looked about as comfortable as a rock probably could be, and he set off in that direction, leaving little, wet footprints trailing behind him. Hoisting himself up onto the rock was hard work, since he was at a nine year old height, but Luke somehow managed it, and he collapsed onto his back, panting and feeling exhausted, but satisfied. He closed his eyes, and he could feel the coolness of the smooth rock through his thin shirt. Luke felt, for the first time that it was cold today, and he hadn't exactly brought a coat when he stormed out. At least the waves were calming and the sound of them gently sloshing against each other relaxed Luke. A salty sea breeze brushed against Luke's skin, and Luke felt happy, despite the events of the day. It was his birthday after all, and tomorrow, it would be his party where he was allowed to invite anyone he wanted. Preferably people who gave better presents than his father.

"The fish are scared." A voice suddenly jolted Luke upright, out of his thought. The palace guards couldn't have found him already could they? Because he was so not ready to go back. Luke's mouth opened, ready to make an argument, but instead of the palace guards, sitting in front of him was a boy younger than him, waving his arm in front of Luke's bewildered face. "Are you alright mister?" Luke blinked a few times and then frowned. He hardly considered himself a mister, but he guessed that this was a younger kid, so it was fine.

Looking at the boy, Luke's curiosity grew. He had big sea green eyes that seemed to swirl around to the rhythm of the waves that were now pounding against the rocks. They sent sea spray, showering down in sparkling droplets on Luke and the green-eyed boy, like salty rain. Luke's shirt got drenched and his blonde hair dripped with water, but when he looked at the other boy, he saw that he wasn't wet at all. Dark messy black hair that looked as black as ink, wasn't flattened at all like Luke's hair was, and his clothes looked perfectly dry.

Overall, the boy was probably around 6, but his eyes held a sort of intelligence and old-age mystery like the type of look really old people had. Like really old. Luke's grandpa had that sort of look sometimes, and it always felt so sad and lonely. That's what the kid looked like, he had this aura of loneliness. Luke wondered what a boy as small as him was doing on this stormy day, without a parent, and wandering on slippery rocks by the sea.

"Yeah, I'm fine." Luke remembered to reply to the question, snapping out of his daze.

The boy offered him a wide smile. "That's good mister."

Luke heard the distant clap of thunder which sent a shudder through his blood. He did not want to be caught up in that storm, and the sea was steadily getting choppier and choppier. This boy had apparently noticed too, and his face fell from its happy expression to one that was worried and sad again. Just then, Luke remembered what the first sentence the boy had said to him was.

"What do you mean the fish are scared?" Luke's curiosity got the best of him when his brain was screaming that fish couldn't possibly tell anyone that they were scared.

The boy stared at Luke as if he was an alien. "They're screaming, can't you hear them? They want me to save them, but I can't. I don't know how." Suddenly, Luke could hear despair and terror in his voice, emotions that this boy should still be too young for. Emotions that Luke himself hadn't felt yet. Luke felt shivers from the cold, and from the unnaturalness of the kid in front of him. It was plain weird, but instead of feeling repulsed and frightened of this strange boy, Luke felt entranced. The boy seemed to notice Luke's shudders.

"Are you cold, mister?" A small arm reached out to Luke's shoulder, and he gradually felt all the cold drain out of him. His clothes and hair dried instantly, and a sort of pleasant warmth spread over him slowly. Luke felt so warm. And then, his eyes snapped open; he gaped openly at the black-haired boy in front of him.

The boy just tilted his head with a sudden unsure gesture. "Why were you wet mister? Did you want to be wet?" Luke stared, not understanding.

"How'd you do that?" He finally whispered faintly. The boy blinked.

"Err… the same way you would do it mister?" Luke decided that he should give up on the issue because he felt that his brain was about to implode if it took any more. He had sensed it from the start, but now alarm bells were ringing in his mind. His kid was definitely not normal. Luke decided that it would probably be safer to get back to the castle now and face his father's rage like a man. That was saying a lot. He really didn't want to go back, but this whole thing was freaking him out. He inched backwards.

"Are you leaving mister?" the boy's eyes were wide and the very picture of innocence. They were also full of sadness. "Will you be my friend?"

Luke's mind reeled. He remembered now, the fairy tales that his mother told him when he was tucked safely in bed and could afford to find the stories amusing. He remembered the rumours about a boy, a boy from the sea who had strange powers. A boy with bright sea-green eyes that everyone ran away from because he was different and dangerous.

Luke swallowed his panic down. "I. Um.. sure." He hoped that the boy wouldn't kill him. There were stories that he killed people sometimes.

But all Luke saw in front of him was the sudden wide grin of a 6 year old boy who looked as if he had never made a friend in his life before. He couldn't believe that this boy would kill people, he just looked like a cute little kid with a strange eye colour.

All of a sudden, Luke realised that he had worse things to worry about, when he saw the sky. It was pitch black, except for the lightning that flashed, shooting bursts of white-hot light every few seconds. The sea was raging, and the waves were 5 times as big as when Luke last saw them. The sea looked pitch black too. Luke stood up. He needed to get away from the beach really fast, because he knew people drowned here, sitting on wet rocks in the middle of a tempest. He looked back at the way he came, and it felt like panic punched him in the gut, because the stepping stones that he had walked across to get to the tall, flat piece of rock were entirely covered in water. He couldn't even see them.

Luke could actually picture it in his mind now, the way the news would spread across the entire nation. Prince Luke, swept out to sea, dead at age 9, a tragic tale to stop other children from playing on the rocks in dangerous weather. Terror gripped him, and he spun around to see the boy sitting in the exact same position, perfectly calm, as if they weren't practically sitting in the eye of a hurricane. Luke suppressed the urged to scream, and tried to think instead. But it was useless, there was no way out, and the underwater currents would drown them, if they tried to swim. They were dead children walking.

Right as he were thinking about it, Luke spotted a colossal wave, like the king of all waves heading straight for the rock they were on right now. It was going to smash them too pieces, Luke was sure of it, and if they survived the impact, they would drown in the ocean. The boy watched it with wide but calm eyes, and stared at Luke's face as if confused by his terrified expression.

"Mister, are you ok? Why are you so scared?"

This boy probably didn't even realise that they were about to get killed. He probably didn't even know what death was. Luke wasn't in the right mood to explain it nicely.

"We're about to die kid, we're going to die!" Luke had to shout to be heard above the deafening thunder. The boy didn't even look fazed, he just kind of sat there confused like he didn't know how a wave could possibly kill them.

"The wave is going to hurt you mister." It was more a question than a statement, and Luke nodded violently. He couldn't believe this kid's ignorance and that he was explaining his own death in his last moments of his life. With a little boy who shared his fate. The situation was bit unreal.

Luke almost missed the stubborn set of the boy's mouth, but he saw a determined expression settle over him. He looked different from the happy kid who Luke met on the rock, and new aura surrounded him.

"It's okay mister, I got this."

Luke severely doubted that. But he didn't had the time to say so, the wave was almost upon them, and it was mere seconds from impact. And the boy stood up to face it like he was embracing death, but Luke tried desperately to find a piece of jagged rock to grab onto. The water was a 20 foot tall wall towering above them, and Luke saw the exact moment it began to curve the deadly arc down. He closed his eyes.

And waited for his death. For a few moments. And nothing happened.

Luke flung his eyes open to see the boy with his hands out, an intense look of concentration on his face, and he stared at the wave that parted, like the red sea, around them. Masses of uncontrolled heavy water fell, but it didn't fall on them. It was like a dome surrounded the rock, and the water slid off the sides of an invisible barrier, without Luke feeling even one drop. It was kind of beautiful and scary at the same time to be in a bubble and watch the water pass around you. Because this wasn't something that happens in nature.

Luke was brought back to the present when he heard the boy panting and breathing heavily as if he needed to catch his breath. When Luke looked at him, he saw the boy's arms and legs shaking violently, and when he last of the water dropped into the sea around them, he simply collapsed. Luke immediately snapped into action, and managed to barely catch him before the kid cracked his head open on the rock. He could see pain written across the boy's face, but under it, an expression of such intense happiness that it bled through all the hurt.

Slowly standing up, the green-eyed boy extended a still trembling arm to Luke, who stared at it in surprise for a few moments. A smile of pure joy exploded and bloomed onto the boy's face, and it looked happier and more real than any smile Luke had ever seen.

"My name's Percy Jackson, mister, and I'm so glad that you taught me how to control it."

A/N: Hope you enjoyed it. Not sure if I want to continue, so give me some response, and I'll see if anyone likes it.

-musicalrainbows