Shortly after the family massacre incident where the father was killed last, Rinco's friend, Togakushi Noeru, is kidnapped. The man who abducted her harbors an obsessive desire, naming Noeru after his own child. The police hasten their investigation, tracking the man's movements, and discover a strange letter... Kuroko narrows down the man's whereabouts to two possibilities based on the contents of the letter and an essay found in the child's room.