Reiko, who lives with her husband's child, Atsushi, who had an accident and disappeared, feels that they are doing well like a real parent and child, even though they are not related by blood. However, one day, Atsushi tries to voyeur Reiko's shower scene, and that thought is shattered. Atsushi tells Reiko that she was threatened by the person whose father caused the accident. Reiko, who has a strong sense of responsibility, calls her home to talk to him directly, but it becomes the trigger for many humiliations that attack Reiko.