Wife Miki is exhausted by her sex life with her selfish and domineering husband, feeling emptiness each day as she secretly pleases herself. However, as mere fingers no longer satisfy her, she secretly orders a vibrator through mail order. Her father-in-law, Kozo, discovers this and pressures her, saying, "Can you teach me how to use this, Miki?" Emotionally and physically starved for fulfillment, Miki resists at first but is repeatedly forced to climax under Kozo's aggressive advances. As her body and mind are gradually unlocked by her father-in-law's touch, it feels as though she is being reborn into a new beginning.