It is post-war Japan, just weeks before American troops arrive for occupation. In the city of Kobe, a boy lies dying in a train station. By his body lies a small metal candy container. A janitor, not sure what to make of its ashy contents, pitches it into the night. As fireflies float softly around it, the ghostly figures of the boy and his little sister emerge...Thus begins the story of 14-year old Seita and his four year old sister, Setsuko. Left orphaned and homeless after a fire-bombing raid on their city, they are forced to survive on their own in a society where rations are scare, and hopes often turn to despair. Finding life with relatives unbearable, they struggle to survive on their own in an abandoned bomb shelter in the country.