Prosper is the only unexceptional Redding in his old and storied family history-that is, until he discovers the demon living inside him. Turns out Prosper's great-great-great-great-great-something grandfather made-and then broke-a contract with a malefactor, a demon who exchanges fortune for eternal servitude. And, weirdly enough, four-thousand-year-old Alastor isn't exactly the forgiving type.