In Tokyo, a cameraman's morbid fascination with death leads him to investigate a gruesome suicide scene. As he delves deeper into the mystery, he becomes obsessed with recreating the fear and horror experienced by the victim. His search takes him to the Tokyo underground, where he encounters a mysterious, speechless woman, F, who he brings back to his home. However, his attempts to care for her reveal a dark secret: F drinks blood. As Masuika's obsession grows, he begins to drain the blood of his victims to feed F, descending into a life of serial killing.