It is the distant future, Supernatural creatures are controlling the small civilizations left on Earth. A beautiful young woman, Doris, has been bitten by Count Magnus Lee for trespassing in his domain while hunting for demons threatening her home. Fearing that her life will be controlled by the Count, Doris hires and offers herself to a man known only as "D", a vampire hunter with a dark past, to hunt down and destroy the Count, end his thirst, and save Doris from a life of eternal damnation.