The Giant War had finally ended. Everything was peaceful, or as everybody thought so. Luke makes a sudden reappearance, and everything in Percy's life tumbles down. Suddenly, he's being sent to a school called Hogwarts, who have accepted him inspite of his disastrous Math grade. But they teach more of Potions, Charms, Transfiguration amend Herbology than Algebra and English. Apollo's spirit of Delphi has disappeared. The prophecies cannot continue without it. Strange things are happening, all at once, and as far as Percy's life goes, he's never met a coincidence. Just monsters who need to be killed.