Masaru just retired and he and his wife Yukiko are expecting to have a quiet life with their cat, CHIBI, after their kids have left home.Yukiko feels that she was abandoned by her husband, who has never expressed appreciation for her years of support, let alone his love for her. One day, their loving cat CHIBI disappears. However, Masaru does not seem to care about it at all. His attitude triggers Yukiko to decide that it is time for them to divorce. After a long, intense discussion, Masaru confesses a story to her, which he has held in secret for years. 孩子他爸，我们一起让猫猫回家吧。初心不变。岁数到了就明白。 孩子們長大後都離開了老家，只留下一對結縭了50年的老年夫婦。太太有喜子（倍賞千惠子 飾）最近對丈夫勝（藤龍也 飾）非常不滿，跟他說話都不回應，自己寂寞得只能跟家裡養的貓咪說話。她跟女兒菜穗子（市川實日子 飾）抱怨丈夫，某天有喜子甚至終於鼓起勇氣打算對勝提出離婚…。
