The war is over but with the new prophecy about seven half-bloods, Chiron decides it's time that they need more allies but will turning to the wizards make thing better or worse. Percy Jackson and his friends travel to Hogwarts but will they like what they find. (warning contains amazingly awesome mind-blowing stuff)

Harry Potter is used to being the Hero of his world. He and every other wizard believes he is the destined savior of the world. Now that wizard world knows Voldemort is back Harry is going to need protection. Percy Jackson has finally defeated Gaea and saved the world yet again and thinks things will start to calm down. Unfortunately for him, he is that protection. Except he can't do it alone. He is going to need the help of six certain people. Worlds collide in Demigods at Hogwarts. (Guys I suck at summaries. I swear the book is better.)