Mai meets Naru while exchanging ghost stories with her friends, and learns her school principal has hired him to investigate an allegedly haunted school building. Mai later causes the injury of Naru's assistant and is forced to stand in as a temporary replacement. The principal also brings in several exorcists and mediums, and more help arrives in the form of a classmate of Mai's, who claims to have the ability to sense spirits.

Bou-san manages to banish the drowned corpses attacking the base, allowing the team some respite. When the sun rises, Ayako volunteers to purify the spirits and performs a successful exorcism, surprising Bou-san and the other members of the team, but notes another force is still at work. Naru wakes up and the team moves to finish off the unseen force causing the disasters. After the team struggles to exorcise with the spirits involved, Naru uses his own psychokinetic powers and finishes the job, only to collapse afterward. He reawakens in the hospital with the rest of the team, cheerfully visiting him in his room.