After the collapse of their relationship, Kiwako abducts the 6-month old child of a man she was having an affair with. Raising the child as her own, it is four years before the authorities catch up with her and the young child.
When the suspect of an arson case refuses to cooperate with the investigation, the detectives search his house and find a locked-up little girl. She doesn't talk and there are no clues to her identity, so assistant psychology professor Narumi Saku is asked to counsel her.
