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.

Ayami reveals Minnie has been exerting a strict control over her, punishing her whenever she breaks a promise to Minnie. The team believes the doll is being used as a vessel by a spirit. After Ayami is involved in a near-fatal accident, Naru discovers previous residents of the house have been plagued with frightening incidents, all resulting in the death of young children.

After a failed attempt to exorcise the spirits of the dead children, a well appears in the middle of the living room. Mai is pulled into the well by a malevolent spirit during a second exorcism. While unconscious, she sees the abduction of a little girl and the subsequent suicide of the child's distraught mother. With this new knowledge, the team is able to cleanse the spirits of the woman and children, restoring peace to the old house.