In Decadent Evil, a vampire named Morella meets a homunculus named Lilith and they begin a forbidden romance. Meanwhile, Van Helsing's descendants are on a mission to hunt down vampires in a strip club. As the story unfolds, multiple murders occur, and a supernatural power is unleashed.

Sugar the good vampire, her boyfriend Dex, and Marvin the homunculous attempt to hunt down a powerful vampire in order to resurrect Marvin's dead son.