After losing her husband, 55-year-old Chizuru finds herself overwhelmed by loneliness and sexual frustration. In her emotional emptiness, she begins to see her own son as a romantic and sexual object. One day, while drowning her sorrows in alcohol, an uncontrollable desire surges within her, driving her to seduce her son one night. As her pent-up desires intensify, their relationship crosses the forbidden line into incest. This is the story of a lustful mother consumed by taboo passion.