In the final months of World War II, 14-year-old Seita and his sister Setsuko are orphaned when their mother is killed during an air raid in Kobe, Japan. After a falling out with their aunt, they move into an abandoned bomb shelter. With no surviving relatives and their emergency rations depleted, Seita and Setsuko struggle to survive.

The Yamadas are a typical middle class Japanese family in urban Tokyo and this film shows us a variety of episodes of their lives. With tales that range from the humorous to the heartbreaking, we see this family cope with life's little conflicts, problems, and joys in their own way.