An unprecedented bizarre murderer appears. The first victim is a young woman. Both breasts were cut off. Kyoko Mizuki, a female medical examiner, begins to feel a strange presence around her after attending the autopsy. The second and third murders occurred as if to mock the investigators. The murderer's M.O. was extremely abnormal and ruthless, mutilating the woman's body. Kyoko tries to deduce that the murderer is a psychopath. Emi, a rookie detective, is the first to get close to the killer, but she is trapped in the opposite direction.
