让（让•迦本 Jean Gabin 饰）在二次世界大战后成为了一个落魄的逃兵。在大雾弥漫的夜晚他搭上了一辆顺风车，并救下了一只小狗，小狗跟着他来到了这座海滨小城。小城的码头上终日雾气弥漫，天空市集尽显压抑之色。让在这里遇到了美丽的奈丽（米歇尔•摩根 Michèle Morgan 饰），两人逐渐相爱，而让却不得不面对自己颠沛流离的逃亡命运。奈丽的监护人扎贝尔杀死了她的前男友莫里斯，奈丽不堪忍受他的占有欲和管教离家出走。让在一次与奈丽的相会中惹上了当地的黑社会分子路西恩（Pierre Brasseur 饰），路西恩觊觎奈丽的美色，一直在追寻莫里斯的下落。正在奈丽回家后面对扎贝尔疯狂侵犯的危急关头，让及时出现打死了这个卑鄙的商人。两人一同走在雾码头的街道上，面对分别的时刻，路西恩却开枪射杀了让……

Professor Henri Faust, retiring after 50 years as an alchemist in a circa-1700 university, despairs at still knowing nothing of the true secrets of nature...whereupon his old acquaintance Mephistopheles, servant of Lucifer, appears and grants him youth and a new life. But with youth, Faust's interest is diverted from science to women. And Mephistopheles, who has taken on the guise of the elderly Faust that was, sets many snares for his young friend's slippery soul... Written by Rod Crawford