讲述了1948年，潜伏于中国国民党空军的中共地下党员方孟敖，为和平解放北平，在千钧一发的时刻，为人民的幸福与安宁，做出艰难抉择的故事。。A man named Mak returned from the battlefield. However, Mak finds Nak, his wife, has died and become a ghost.。
