Ten millennia hence, Earth has transformed dramatically; beasts stalk the terrain unrestrained, while inhabitants—armed with advanced weaponry and mechanized steeds—maintain a modest existence reminiscent of earlier ages. The narrative centers on a tiny village besieged by fiends, governed beneath the dominion of Count Magnus Lee, an ancient vampiric tyrant who has presided over the realm for ages. When a young maiden is attacked by the Count and selected as his latest captive, she turns to a silent itinerant named D for aid. Coincidentally, D ranks among the planet"s foremost vampire slayers and vows to dismantle Lee"s legion and end his reign.