Alvin is the companion of a rich influential lady. He sold her his own future for the opportunity to save the family. At one of the balls, the young man meets Sheriad, the king's niece. She is rumored to be related to black sorcerers. The princess is so interested in Alvin that she takes the companion to her estate. The young man prepares to die, but Sheriad calls him a magician and brings Arliss to the academy. Here he will learn the art of a demonologist. However, Alvin does not believe in magic and considers himself a mere mortal. But everything changes when the Demon Lord appears before him, eager to get the magician for his service. The demon blackmails the young man, and now he has to choose which side he is on...