The housewife Ria, who lives with her husband's parents in a two-generation household, experiences a marriage scam and is burdened with a large amount of debt when her brother-in-law, who has lost everything in both his career and personal life, temporarily returns home. One night, he becomes aware of the sounds of his brother and sister-in-law's nocturnal activities and finds himself tormented with feelings for his sister-in-law. The intense summer heat makes Ria's sweaty body shine dazzlingly, and the brother-in-law loses his reason...
