While attempting to flee from a cruel customer whom he had been sold to, young Adolf Malcart runs into Belfegor, the fourth prince of Hell. With Belfegor wanting to use him as a sacrifice for his father, the boy is set on a different course of action. Tired of having to suffer while people more deserving of punishment go free, Adolf proposes a bargain to Belfegor. But Belfegor is the very definition of a demon, and making a deal with the devil rarely ever ends happily...