Seeking to cure his rare blood disorder, Dr. Michael Morbius has cursed himself with an insatiable lust for human blood. While trying to cure his horrific condition, he and his ally Amanda Saint run afoul of the Demon-Fire Cult. Catherine Saint--Amanda's sister and one of the cult's leaders--desires two things above all else: to unleash the powers of Hell on Earth, and to kill Morbius and Amanda.