Mr. Watanabe, a middle-aged government worker, suddenly finds that he has very little life left when diagnosed with terminal cancer. Moving from drunken despair to quiet resolve, he vows to make his final days meaningful. At first he throws himself into the city's nightlife, but this does not help. His attempts to communicate his anguish to his son and daughter-in-law lead only to heartbreak. Finally, inspired by an unselfish co-worker, he turns his efforts to bringing happiness to others by building a playground in a dreary slum neighborhood. When the park is finally completed, he is able to face death with peaceful acceptance.