During a sweltering summer, while her husband is away on a business trip, Nozomi is assaulted by her live-in father-in-law. From that night onward, every time her husband travels, she is violated again. Each time her husband returns and makes love to her, she feels guilty, yet inexplicably finds herself drawn to the sweaty, greasy sex with her father-in-law. As this pattern continues, she is forced to confront her own conflicting emotions.