It is near the end of World War II and the citizens of Japan are being hit hard in one bombing run after another. Being the family of a naval officier has protected Seita, his little sister and his mother for most of the war, but that all changes after his mother dies in an air-raid. Now, even though he is only a child himself, Seita must struggle to keep himself and his sister, Setsuko, alive. It is a tragic tale of war's most innocent victims...