A party was held for the 70th birthday of their father, Shohei. What was told to his daughters, who haven’t all gathered together for a long time, is the fact that their strict father had contracted dementia.
While being confused about the situation of their father losing his memory day after day, the family members reconsider their own situation by facing that reality.
One day, the family members learn that a “lovely memory” that everyone in their family had forgotten, is still living in Shohei.