1945年8月,美军一架B-29轰炸机在广岛投掷一颗原子弹,不仅造成多人死伤惨剧,也将当地夷为平地。面对到处断桓残壁、医疗物资缺乏惨景,当地德国席门神父卷起衣袖协助日本人安置,而广岛医院仅剩的原医生则设法利用病人症状、血液与病人距离原子弹远近作为研究重点,设法找出治疗方式。随后,日本天皇藉由广播发表投降宣言,但仍无法停止日本人的悲恸,对美国人的愤恨…The movie follows the perspective of several characters (such as Japanese victims, soldiers, American prisoners of war and others) and how they lived or tried to survive the effects felt during the aftermath of the Atomic Bomb dropping by the Enola Gay at Hiroshima, during World War II.