The story begins with Momoe (34), a married woman, embarking on a one-night, two-day trip with a man she's just met for the first time. Drawing attention as the 155th installment of the hit series, this film portrays a 24-hour close-up of a housewife confronting harsh reality. Her marriage began as an office romance with her older male colleague—eight years her senior—and they are now entering their ninth year together. While their early years were happy, major challenges arose in their fifth year when they struggled to conceive. Her husband survived a serious traffic accident but suffered severe head trauma, leaving him with permanent memory loss and unable to return to work, forcing him into long-term home care. To support the household, Momoe took on part-time work and tirelessly helped her husband cope with his deteriorating memory. Amid this difficult life, the situation Momoe feared most begins to unfold into a new and unexpected development.