Saho lives with her husband and his parents. One sweltering midsummer day, her husband's younger brother Kenji comes home after being laid off. In the midst of his days of being shunned by his family and growing irritated, Kenji unintentionally attacks Saho, confused by Saho's sweaty body. During her husband's business trip, Saho is raped and resists, but she can't hate Kenji and is tied up again before her husband returns. A midsummer love affair with dripping sweat.