Saho lives with her husband and his parents. One sweltering summer day, her brother-in-law Kenji returns home after being laid off. Amidst days of alienation and growing frustration within the family, Kenji is drawn to Saho's sweaty body and assaults her. While her husband is on a business trip, Saho is raped and struggles to resist, but she cannot bring herself to hate Kenji and sleeps with him again before her husband returns. The dripping sweat makes their summer affair all the more sensual.
