Mr. and Mrs. Shizuma and their niece Yasuko make their way through the ruins of Hiroshima, devastated by the atomic bomb. Five years later, Yasuko is living with her aunt and uncle, and her senile grandmother, in a village containing many survivors of the bombing. Yasuko does not appear to be affected, but the Shizumas are worried about her marriage prospects, fearing that she might succumb to radiation sickness at any time.