Married woman Yumiko (34) is followed 24 hours a day to uncover the reasons behind her repeated affairs. Unhappy in her marriage, she regrets marrying the first man she ever dated. Her husband works irregular hours, often staying away from home for two or three days at a time, causing their relationship to drift apart. With little communication and no children, her loneliness as a full-time housewife becomes increasingly evident. Through a two-day, one-night trip with a man she has just met, her inner world is brought sharply into focus.