DISCLAIMER:-I do not own any of the characters or places in this fanfic (except maybe my OCs). All rights belong to J. K. Rowling, Rick Riordan and the publishers of these books. No money is being made from this fanfic.

Warning:- Contains some violence and dark themes in later chapters. May also include death of some minor characters.

Pairings:- Harry/Percy (you must have seen this one in the summary already), Leo/Hermione (I think they'll make an interesting couple) and the pairing of two characters who are going to be Harry's parents in this fic (not gonna spoil). Also maybe Draco/OC, not sure about this one currently.

Chapter 1-The Beginning

Harry Potter was standing in the Weasleys' garden with Professor Dumbledore and staring at his headmaster with a completely astonished look on his face. Thoughts such as, 'This is a lie!', 'No way in hell could it be true!' were spinning through his head.

Dumbledore had interrupted his sixteenth birthday celebrations going on in the 'Burrow' and called him so that he could reveal some important information to him. What he'd told Harry however, was the most shocking and least expected thing Harry could have ever heard.

"But Professor, how could this be possible?" Harry at last asked Dumbledore.

"I know this is hard for you Harry, but what I am telling you is the truth. According to this letter written by James and Lily, they had adopted you from a very poor woman in Godric's Hollow who was soon going to die. They have further stated in the letter that their own son had died due to spattergroit but because of the prophecy they couldn't let this news out. Hence they adopted you from that poor woman, for whom they felt a lot of sympathy," Dumbledore finished looking very grave.

"But... But how come no one found this letter before?" Harry asked still staring at Dumbledore in a shocked manner.

"They had done an age enchantment charm on this letter so that it would magically appear in your vault the day you turn sixteen. That's how the Gringotts goblins found it this morning. You can have a look at it yourself," said Dumbledore, handling the letter to Harry.

Harry took the letter, his hands shaking slightly. He couldn't believe what he was reading. He wanted it to be a fake pretty badly, but there was no doubt that the letter was real. The Gringotts' goblins and Dumbledore himself had checked it but it had turned out to be genuine. Though Harry just couldn't believe this. His whole life was a lie. He wasn't a Potter, no, his mother was some poor woman who had died because of spattergroit. And his real father, whoever he was, was out of picture.

"But, then, what about the prophecy?" Harry asked about the one thing which he was dreading the most. The weight of the prophecy had been haunting him all summer, and now the confusion created by the letter only made things worse.

"The prophecy is not applicable to you anymore. It could still have been applicable to Neville Longbottom, but since Voldemort didn't mark him as his equal we can safely assume that the prophecy has became null and void," Dumbledore replied.

Harry had at least a dozen more questions to ask to his headmaster, but just then he heard Ron's voice from inside the house asking him to come quickly as he had to cut his birthday cake. Harry felt as though this was the worst birthday of his life.

"Come on Harry, let's leave this charming garden and get inside, you might want to tell this to your friends," Dumbledore said and smiled at him in his usual kind manner.

"Do we have to?" Harry asked in a low voice.

"It is up to you Harry, but I suggest you tell this to your friends as it will make you feel better. Also, I think, members of the order should know about this as it will help us plan our further moves against Voldemort," Dumbledore answered gently, knowing that this was going to be quite hard for Harry.

Harry nodded slowly, and the two of them went inside the Burrow to tell the shocking news about Harry's parents to everyone.

AN:-Hello fanfiction readers, this is my first fanfic and I decided to write a crossover between HP and PJ because they are my most favorite books. Please review if you like the story or have any suggestions.

Also note that I had started writing this fanfic well before 'Blood of Olympus or even 'House of Hades' had been published, so a few things are going to be different compared to canon (like Octavian surviving the war against Gaia, etc)

Warning:- This fanfic contains some Jason-bashing, so if you don't like that kind of stuff you might not want to read any further.

Any flames you send would be used for roasting marshmallows. :p