In the distant future vampires and monsters have overrun the earth and no hope is in sight till one day a lone hunter by the name of D arrives, riding a cyborg horse, carrying a powerful sword, and bearing a deep dark secret. D, a haunted half-human, half-vampire warrior, wanders the countryside of a feudalistic future, hunting his own kind while battling his own evil nature. Like a rogue samurai, the silent, solitary hero wanders into a small hamlet terrorized by the all-powerful Count, a monstrous vampire lord, and his demonic minions from a castle that casts a long shadow over the countryside. The Count has claimed the human Doris as his bride. D becomes her protector and - when she's captured by the Count's shape-shifting minions - her savior.