Just off the coast of mainland Japan is the island of Chisakura, home to a city of the same name, where the heralds of darkness are slowly gathering. Host to a prosperous economy, with a nationally renowned academic institution for young women and an equally upstanding medical research facility, the community has unwittingly attracted the attentions of dreaded supernatural creatures with few equals: vampires. Yet even these immortal predators have daring individuals who hunt them, and a secret war between the two powers is quickly racing to an apocalyptic conclusion. At the center of this nightmarish struggle is a man who has the potential to tip the scales in favor of one side or the other. His choice of allies - the hunters, the vampires, or none at all - may very well determine the fate of humanity and the undead.