My taking on the cliche demigods go to Hogwarts. Hades has a request for his only son, to destroy the horcrux's made by Tom Riddle. He is allowed to bring one other, and if course takes Will. "Light and dark must forge a path, To escape the dark one's wrath. The boy who lived destined to die, By the hand of the one destined to lie."

Nico di Angelo does not want to work with the Avengers. But Chiron has decreed that he is the best for the job, so now he has to deal with billionaires, assassins, rage monsters, Norse gods, and souls out of time. Wonderful. Solangelo and BoO spoilers.