A handsome, youthful husband with a beautiful, big-breasted wife suddenly stops having sex with her. Frustrated and sexually unfulfilled, the wife begins masturbating in the bathroom every night, unaware that her father-in-law secretly watches her. Drawn to his warmth and affection, she eventually embraces him passionately. When the father-in-law's friend learns of this, he makes a bet with him—if he wins, he earns the right to sleep with the wife. The wife, who normally sleeps wearing an eye mask, mistakes a nighttime visitor for her father-in-law and submits her body willingly. When the mask comes off, she sees the father-in-law is already there, and under the influence of aphrodisiac drugs, she can't resist begging for more. Then one day, right before her husband's eyes, the wife—wearing only her underwear—is surrounded by three elderly men, her body trembling as she gives herself to them.