Dumbledore's Questionable Plan

Dumbledore fears the upcoming battles against Voldemort. So, he asks his old friend, Chiron, to send reinforcements. Chiron sends Percy, Annabeth, Thalia, and Nico to pose as wizards and help win the war. As they attend Hogwarts, the Golden Trio becomes suspicious on their identities. Will they blow the demigods' covers before the war is over? T for violence.