In her third year of marriage, a housewife goes on a one-night, two-day trip with a man three years her junior whom she met at work. He is an inexperienced, shy man who understands her emotionally, yet her inner longing remains unfulfilled. Despite feelings of guilt, she resolves to betray her husband. On this first trip in a year, she allows intimate closeness with someone new. Amidst overwhelming curiosity and guilt, she ultimately reaches a day of forbidden passion. As she is held by a man who is not her husband, the married woman burns with desire while blushing with shame, overcoming her inner turmoil.