After her husband dies in an accident, Chika is left alone with her son. During the day, she acts cheerfully as a mother, but at night, she consoles herself by remembering the happy days she had as a woman. Her son, peeking at her and becoming aroused, attacks her, desiring for her body. Although she resists, Chika senses the image of her husband, who once desired her in the same way, and gives himself over to a forbidden affair.