Set after the Second War and the Giant War. The demigods (the Seven [minus Leo], Nico, Rachel, and the Stoll twins have been having a relatively nice in Camp Half-Blood. With the Giant War over and Gaia defeated, it seemed like they were finally going to have a normal life... until Chiron tells them they have to go to a school for witches and wizards called Hogwarts.
Things are going to get interesting...
After fighting a bloody war with Gaea, the demigods at camp half blood get issued a prophecy asking them to bring back a son of Hecate who was mistakenly taken by the ministry of magic to be a wizard. Their time at Hogwarts is full packed as their presence in the magical world weakens the border of Gods and wizards and monsters follow them just the same. Just like always, they have been assigned an impossible task as the identity of the misplaced demigod comes to them as a shock.