Stranded in the space between the human world and the demon underworld, the series central characters are a beautiful Japanese vampire girl named Miyu and her Western Shinma companion Larva. Miyu is the daughter of both a human being and a Shinma (a name for a race of "god-demon"). She was born a vampire and as such, she was awakened as the guardian whose destiny is to hunt down all stray Shinma and send them back to "the Darkness"; charged with the responsibility of returning the evil demons away. Before turning 15 years old, she yearns to return to the darkness herself but not until she has banished all the Shinma from Earth.
