After finishing her night shift, nurse Yuri, driven by fatigue-induced intense sexual desire, had been indulging in passionate sex every night with her neighbor. Witnessing her behavior firsthand, her father-in-law became aroused and devised a bold plan with the help of an elderly friend. When the old man feigns illness and stays overnight at the father-in-law's house, Yuri is assigned to care for him. The father-in-law repeatedly sexually harasses her—claiming the food is too hard and making her feed him mouth-to-mouth, or demanding she assist during baths while exposing the old man's naked body. Unexpectedly, Yuri grows increasingly aroused, becoming drawn to the elderly man's aging body. Her actions vividly reveal the raw essence of a woman consumed by desire.