Boozy, brassy Apple Annie, a beggar with a basket of apples, is as much as part of downtown New York as old Broadway itself. Bootlegger Dave the Dude is a sucker for her apples --- he thinks they bring him luck. But Dave and girlfriend Queenie Martin need a lot more than luck when it turns out that Annie is in a jam and only they can help Annie's daughter Louise, who has lived all her life in a Spanish convent, is coming to America with a Count and his son. The count's son wants to marry Louise, who thinks her mother is part of New York society. It's up to Dave and Queenie and their Runyonesque cronies to turn Annie into a lady and convince the Count and his son that they are hobnobbing with New York's elite.

美国的一个小镇，Jefferson Smith（詹姆斯·斯图尔特 James Stewart饰）是当地的童子军的首领，深受青少年们的喜爱，被选为新的参议员，来到了华盛顿。遇到了他父亲的老朋友，同为参议员的Joseph Paine（克劳德·雷恩斯 Claude Rains饰），并且迷上了Joseph的漂亮女儿。单纯的Jefferson从来没来过华盛顿，在华盛顿闹了不少笑话，被媒体纷纷取笑。Joseph让Jefferson起草一个提案，并让他的女秘书Clarissa Saunders（琪恩·亚瑟 Jean Arthur 饰）协助Jefferson。然而Jefferson却发现，他的这个所谓参议员不过是其他老谋深算的参议员手中的木偶，他发现了他们一个巨大的阴谋。Jefferson决定以自己单薄的力量来对抗那群人，来改变这个腐败的政治环境。到底他能否成功？史密斯先生的华盛顿之旅会如何结束？ 本片获第11届奥斯卡10项提名，赢得最佳原创剧本一奖。