Non, a married woman in her fifth year of marriage, is dissatisfied with her sex life despite the seemingly happy life she has with her husband, who is much older than her. Despite this, Non continues to do her best to be a good wife. One day, while hanging out the laundry, she witnesses a secret meeting between two neighboring wives. Although she knows it's wrong, she can't get the scene out of her head. After a long time, Non tries to seduce her husband, but it doesn't work. Her sexual frustration grows, and after midnight, she loses her sense of reason as a married woman and runs out of the house in obscene underwear...