The Percy Jackson origin story is that he is a demigod, the son of Poseidon. He discovers his true identity when he faces various strange and dangerous situations. For example, he has problems at school like getting into fights without really understanding why he has such unusual strength and quick reflexes. Eventually, he is led to Camp Half - Blood, a place for demigods like him, which is where his real journey of self - discovery and adventure in the world of Greek mythology begins.
Percy Jackson's origin story starts with him being a seemingly ordinary kid, but things start to go wrong. Monsters start chasing him. He has dyslexia and ADHD which are actually signs of his demigod nature. His mother takes him to Camp Half - Blood where he meets other demigods. His father being Poseidon is revealed, and from there, he embarks on a path filled with quests and battles against the forces of the Titans and other threats to the world of gods and demigods. It's a story of a young boy coming to terms with his extraordinary heritage.