Wife Yoriko, after 25 years of marriage, struggles with her relationship with her husband and decides to go on a one-night, two-day trip with a man she just met. She began dating her husband when they were students and has spent most of her life with him. Lately, however, her husband's strange behavior has troubled her, forcing her to face problems beyond her understanding. Despite appearing as a modest and gentle housewife, she finds herself staring at an unfamiliar ceiling during the trip, internally torn by deep conflict. Through this journey, the emotional turmoil within this married woman and the hidden secrets of her marriage gradually come to light.