Chastity of Sister-in-law

After returning to Korea from studying in the U.S., Ji-won stays at her married older sister Ji-soo's house for the time being. Her brother-in-law, Dong-won, goes out of his way to make sure she feels comfortable at home, offering both material and emotional support - even introducing her to his junior, Min-ho. One day, while drinking at home with the married couple and Min-ho, a tipsy Ji-won begins making seductive advances toward him.