Sam (Hume Cronyn) and Cora Peek (Jessica Tandy) dance to celebrate their 50th wedding anniversary, surrounded by friends and children, grandchildren and great-grandchildren. Not long after this party, Cora dies suddenly, and Sam is left alone and depressed. His anxious, protective children try to manage his life, down to what he eats, but Sam wants to be left alone. There is a classic, often comic conflict between the stubborn, independent old father and his worried, controlling children.

To help Sam, his wife returns from the dead as a white dog which he feeds and cares for, but she keeps hiding when the other family members appear, so they think Sam is hallucinating and demented. When Sam has a stroke, however, the white dog runs to a family member's house and barks for help, saving Sam's life. Later, as Sam recovers and walks using a walker, the white dog "dances" with him by putting her front paws on top of the walker. She also saves his life another time when she leads family members to a stream where Sam has fallen. Mostly she is there as his loving companion, leaving only when Sam dies.