本片改编自中岛京子同名小说，讲述原是中学校长的父亲(山崎努饰)被确诊为认知障碍后，他是如何和妻子曜子(松原智恵子饰)及两个爱女(竹内结子、苍井优饰)度过接下来的时光的。A seventy-year-old retired school headmaster informs his wife and daughters that he has Alzheimer's disease. They are all concerned, but react differently due to their individual situations. The family watches as the husband and father regresses due to the disease and loses his memory. Interestingly, there are sparkling moments of his life of which the man will not let go.