Cain Pseudomantis leads a miserable life. Bound to the mortal world by a powerful spell no demon could hope to break, he must obey his human master's every command or face harsh punishment. He finds solace in the rock music which he listens to when he isn't running unsavory errands for his master. Then everything changes. While on a mission in a seedy section of 1980s Los Angeles, Cain impulsively buys an electric guitar and discovers an unusual talent for music, a talent that catapults him to hair metal stardom. With three superpowered human band mates and his beautiful girlfriend Michelle...

When a gentle demon flees his life of slavery for the rough streets of 1980s Los Angeles, a thrift store guitar becomes his refuge, enabling him to weave together music and magic into rich audiovisual tapestries. Cain Pseudomantis quickly finds himself embraced by the city's rock scene and swept into a new life, along with three magically gifted human band mates. But fame does not heal Cain's woes. Hounded by an overzealous televangelist and unable to completely shake off the trauma of his past, he finds himself alienated and treated as an object of fear even as his fan base grows. Meanwhile...