Saho lives with her husband and his parents. One sweltering midsummer day, her husband's younger brother Kenji returns home after being laid off. As Kenji grows increasingly irritated at being shunned by his family, he is seduced by Saho's sweaty body and attacks her. While her husband is away on a business trip, Saho is raped and resists, but she can't bring herself to hate Kenji and they end up uniting once more before her husband returns. A midsummer affair with dripping sweat and sensuality.