Ria is a married woman who lives with her husband's parents. One day, her brother-in-law, who was the victim of a marriage scam and is left with a huge debt, returns home for a short time. Having lost everything, both his job and his private life, one night he hears the sounds of his younger brother and his wife having sex, and begins to feel aroused towards his sister-in-law. In the sweltering summer heat, Ria's sweaty body is so bright that it makes his brother-in-law lose his senses...