In Tokyo, an old person, who lived alone, is found dead. Police detectives investigate the case and according to the victim's neighbors, a woman sometimes came in and out of the victim's home. That woman is Miki Yamamoto (Hiromi Nagasaku). She does housework for her customers. The detectives visit Miki's house and ask a lot of questions to find out more about what happened and why but there are more questions than answers. The question remains, what is the truth behind the case and what happened to this person?