Atsuko Fukune, a club dancer, is targeted for kidnapping by an odd group of men. To escape the clutches of her assailants, she reaches out for assistance from Mamiya Mugen, a celebrated detective who is a child prodigy. Mamiya's investigation reveals that more young women have gone missing. With Alucard, his butler, aiding him, Mamiya sets out to unravel the mystery and bring the culprits to justice.