Joan is the secretary to the public defender in a large city. She is in love with a career criminal named Eddie, and she believes that he is a basically good person who just had some tough breaks. She uses her influence to get him released early, and he tries to go straight after marrying her, but things don't work out, and they both go on the lam. 乔安（西尔维娅·西德尼 Sylvia Sidney 饰）在公共治安防卫队工作，这也就意味着，她平日里打交道的，都是一些非常危险的犯罪分子。好巧不巧的是，乔安竟然爱上了其中的一个，那是一个名叫艾迪（亨利·方达 Henry Fonda 饰）的男人。 高大英俊的艾迪给予了乔安一种错觉，那就是他本质上其实是一个好人，只不过一时走火入魔才走上了犯罪的道路。乔安坚信通过自己的努力，能够使艾迪改邪归正重返社会。在乔安的帮助之下，艾迪通过良好的表现获得了减刑，并且最终刑满出狱，之后乔安和艾迪携手步入了婚姻的殿堂。然而，一个人的本性真的能够如此轻易的被改变吗？
