The SPR team, joined by the exorcists and mediums from the previous case, are requested at a house where poltergeist-like activity has been taking place. Soon after their arrival, the ghostly occurrences escalate, leading Bou-san to conclude the house is haunted by something more than a mere poltergeist. A young girl in the family, Ayami, exhibits strange behavior, claiming her doll Minnie has been speaking to her. The SPR team observe Minnie closely, with disturbing results.

Masako requests Naru investigate a park where over six months, couples have had water dumped over them from thin air. The team, excluding Lin, split up at Masako's suggestion into pairs and they soon attract the spirit of a woman. Taking possession of Masako's body, the woman explains she died soon after being cheated on by her boyfriend. Mai convinces her to let go and move on to heaven, but not until they have forced the cheating partner to acknowledge the hurt he caused.

Mai wakes up in the nurse's office, after several events nearly lead her to her death again. Mai's lamentation on learning the SPR have been asked to leave after the latest disasters prompts Naru to muse over a theory. He speculates that the spirits were deliberately called and expected to devour each other until the strongest remained. This spirit would possess the school, but require human sacrifices. Lin discovers the instructions for 'Orikiri-sama' have been designed to ensure participants unknowingly contribute to a death spell, the target of which is someone at the school.