An old middle school principal who had just retired and felt that he was "useless" clumsily made a short video in order to talk to his grandson. It unexpectedly became popular and made him acquainted with a group of "old friends" who had their own difficulties. In the process of helping his children, raising his grandchildren, and having a twilight love affair, he rediscovered the feeling of being needed - retirement is not the end, but the starting point of a second life.
