After being separated from their parents, following the American bomb that strikes them, two young siblings, Seita and Satsuko, two Chinese siblings, who have to confront all their fears and face all the obstacles and the hard nature of war, as they struggle against survival.
Such odd hopefulness, flitting around a child, mixed with the overwhelmingly sad, pervades Isao Takahata's film. And all around Seita and Setsuko, nature, in the face of human destruction and tragedy, persists in its beauty.
The ephemeral fireflies, which fascinate the children and accompany them everywhere, become a potent and lyrical symbol of the fragility, brevity and beauty of life.
Writer-director Isao Takahata, a frequent collaborator of Miyazaki's at Studio Ghibli, adapted a partly autobiographical novel by Akiyuki Nosaka, and his handling of the tragic story is masterfully understated.