Jack Slade, Demon Hunter, special operative for the Diamond Group, travels to San Francisco to help the police solve a series of vicious murders. Once there, he finds out that behind the murders is a powerful vampyre whose goal is world control. He fights the monster's assassins, battles his half-demonic minions and finally faces the vampyre himself in an epic battle for dominance. In the process, Slade discovers secrets about himself that will change his life forever.