Author's Note : This is my first posted story. If anyone reads this, please review. I'd love the help. So, the timeline is after HoO (Before ToA and MCGoA) and for HP during OotP. Enjoy!

DISCLAIMER : Full rights to JK Rowling and Rick Riordan.

"Percy." A voice whispered. Percy groaned and rolled over. "Percy!"

He felt someone shaking his shoulders. He relented, opening his eyes, refreshed after his third nightmare-free night in a row. Being at Camp Half-Blood, being safe - or as safe as a demigod can be - had reduced his and Annabeth's nightmares considerably.

Percy's vision cleared. Looking down at him were a pair of intense grey eyes. Instantly, Percy's day was better.

"Hey, Wise Girl." He said, sitting up to kiss her. "What's up?"

"Chiron wants us in his office." she said, her smile disappearing.

"You're kidding!"

"Nope. Fifteen minutes. Go!" She left, the door swinging. Percy sighed and began scouring the floor of cabin 3 for any clean clothes.

"Aha!" he yelled aloud, triumphant from finding a pair of clean shorts and a slightly wrinkled orange Camp t-shirt. Percy ran his fingers through his hair, brushed his teeth and bolted out the door.

He made it to the Big House with thirty seconds to spare.

"Wow," Annabeth exclaimed, "You're on time?"

"Don't sound so surprised." He defended.

"Children," Chiron interrupted. He was in wheelchair form. "Sit, we have much to discuss."

They sat, praying this meeting wasn't about what they thought it was.

"You won't like this," Chiron shifted uncomfortably in his wheelchair, "But there's been a request for you two. A job."

Percy stood up quickly, "No."

"Please, Percy, just let me explain it to you." Percy sat down, scowling. "A week ago, I had a message from an old friend of mine, Albus Dumbledore." Percy made a loud choking sound. Annabeth smacked his shoulder. "He needs two demigods for a special mission." Chiron paused, waiting for a reaction.

"What kind of mission?" Annabeth asked.

"You're needed to protect a group of children."

"Are they demigods?"

"No." Chiron shifted uncomfortably again. "There are some details that I can only tell you should you accept the quest."

Percy saw Annabeth tense slightly, neither of them were eager to go on another quest so soon after the Giant War. Annabeth sent Percy a look that seemed to say, Well? She was putting the decision on him. Percy examined Chiron's face and realized that they didn't have a choice.

"Alright." Percy said, voice quavering slightly. "We'll do it."

"Perfect!" Chiron said. "Now, about the children. Albus is the headmaster of a school in Scotland. A school for wizards."

"What?" Annabeth and Percy yelled in unison.

"Wizards aren't real!" Annabeth said, pushing Percy's jaw closed - it had been hanging open.

"Ah, but isn't that what you said about the gods?" Chiron had a point there. "Now, the three children you are to protect go to this school. Your job is to befriend them and protect them from an evil wizard intent on killing one of them."

Percy's brain was furiously trying to keep up, processing faster than normal.

"The evil wizard's name is Voldemort. He wants to kill a young boy named Harry Potter. You cannot let that happen. You'll be attending the school for this year, and you will be joining fifth year because of lack of magical knowledge. And before you say anything, all your marks will be carried over for New Rome University. Also, you cannot let them know you are demigods."

"Okay, but, Chiron," Annabeth said, "We're not wizards."

"Yes, I'm aware of that." Chiron explained, "Albus had some wands made that are enchanted to perform spells without magical knowledge."

"Okay, but how do we get there?" Percy said, eager to have some input on the exchange.

"I've arranged a flight fr-" He didn't get to finish.

"WHAT?!" Percy yelled, turning pale. "Did you say flight?!"

"Percy, calm down." Annabeth grabbed his hand and his colour returned.

"As I was saying," Chiron continued, "I've arranged a flight from Manhattan Regional Airport to London. When you arrive at the airport you'll meet a man named Sirius Black. He'll take you to a meeting with an organization called the Order of the Phoenix" Annabeth opened her mouth to ask a question but Chiron held up his hand. "Annabeth, just let me finish. The Order was created by Albus when Voldemort first rose. You both will become members. After the meeting, Sirius will escort you to the train bound for the school. Any questions?"

"Yeah," Annabeth said, "First, you never told us what the school is called."

"Ah, yes…" Chiron eyed Percy suspiciously. "The school's name is Hogwarts."

Percy couldn't help it. He burst out laughing. "Hogwarts?"

He saw Annabeth trying to suppress a smile.

"Okay," Annabeth said after Percy had calmed down, "When are we leaving?"

"August 31st."

"That's two days from now!" Annabeth exclaimed.

"Yes, I apologize, it was very last minute. Any other questions I'm sure the Order can answer, now go pack!"

"Wait! How will we recognize this… Harry Potter?"

"He's been marked by Zeus."

"What?" Percy asked.

"Go pack!"

"But-"

"Go!"

Percy and Annabeth got up and walked out the door, incredibly confused. "He's worse than the Oracle." Percy said.

Percy was just finishing packing when Annabeth let herself into his cabin. Not that he minded, of course. "You done packing, Seaweed Brain?" she asked.

He zipped up his bag, "Yup!"

"Great! Argus is waiting in the van."

They had an overnight flight to London. Chiron had made Zeus promise not to shoot them out of the sky. Chiron had also decided that Percy might feel better about flying if he could sleep on the plane. Percy picked up his bag and ran out the door, taking Annabeth's hand on the way out. Together, they ran up Half-Blood Hill.

"How much longer?" Percy asked Annabeth.

She sighed, "Half an hour."

"Really?" Percy was sure it had only been about two hours.

"You've been asleep for six hours, Percy."

"Oh."

The over-com crackled, "This is your captain speaking, we'll be starting our descent into London shortly. The temperature is currently 10 degrees Celsius and sunny." The seat-belt sign light turned off. Percy's ears began to pop and his stomach turned. He gripped Annabeth's hand tightly. She gave a reassuring squeeze and smiled at him. Gods, he loved her.

The plane landed safely and slowed down. Percy resisted the urge to jump up and dance around in relief. Instead, he pecked Annabeth on the cheek. "Thanks, uncle." He muttered, looking up, imagining his uncle, Zeus, angry that he wasn't allowed to shoot his least favourite nephew out of existence.

Percy and Annabeth collected their bags and went to look for Sirius Black.