After Luke Manchett inherited eight hostile spirits from his dead father, he does his best to ignore the supernatural and move on with his life. But when a girl named Ash suddenly appears at school, claiming to need Luke's help to save her twin sister who was attacked by a demon, Luke is drawn into a spiral of more and more dangerous favors. Luke must summon the deadliest members of his Host and return to Deadside before the most important thing in his life is lost.