Yuki deeply disliked her husband's younger brother, with whom she had always clashed. Suddenly, her brother-in-law appeared, claiming he was on a business trip and asking to stay for two or three days. Her husband readily agreed, but Yuki furiously confronted him. However, the brother-in-law's true intentions had nothing to do with business. His real motive would shake Yuki to her core. The unexpected visit brings rising tension and turmoil into their household.