Kumiko (Kijima Airi) lives a happy married life with her husband, Seiji. One day, a cleaning worker named Shimosato visits her home. Impressed by his demeanor, Kumiko hires him for house cleaning. However, Shimosato's true motive stems from his twisted desire to "defile beautiful things." He slips her a sleeping drug, rendering her defenseless, and rapes her. Under ongoing blackmail, she is repeatedly forced into sexual encounters. Yet, in contrast to her calm and indifferent husband, Shimosato's intense sex awakens a new, thrilling sensation within her. The suppressed desires of her femininity begin to stir and emerge.