One day, Etsuko finds a hostess's business card in her husband's suit pocket. Shocked and heartbroken, she stands alone drinking beer to numb the pain. At that moment, her son Minoru quietly approaches and gently comforts her. To Etsuko, Minoru has become her only dependable person. Then one day, another woman sees the two of them walking together. Consumed by jealousy, Etsuko does the unthinkable with her own son.