本(詹姆斯·斯图尔特 James Stewart 饰)和乔(桃丽丝·戴 Doris Day 饰)是一对感情十分要好的夫妻,带着儿子汉克(Christopher Olsen 饰),一家三口来到了风景如画的摩洛哥度假。一次偶然中,本和乔结识了名叫路易斯(丹尼尔·盖林 Daniel Gélin 饰)的男人,他们在一起相处十分融洽。不幸的事情发生了,路易斯被凶手刺杀身亡,临死前,他透露了一个神秘的名字——“安伯斯·查培”,并且告诉本和乔,有人正在伦敦执行一项秘密的暗杀行动,在得知了这个惊天秘密后,本和乔来到了伦敦。暗杀者自知行动泄露,为了取得最后的成功,他们不择手段绑架了汉克,可即便如此,也没能动摇本和乔声张正义的决心。
High Noon tells the story of a lawman named Will Kane (Skerritt) who has just married a young bride, Amy (Thompson), promising to leave his dangerous career and settle down for a quiet life. Just as they are about to leave, word comes that a vicious killer Kane had sent to prison years earlier, is coming to town on the noon train seeking vengeance. Kane attempts to rally the town to fight the gunman, but not even his former deputy Harvey (Diamond) is willing to help. Harvey's cowardice infuriates his girlfriend, Helen (Alonso), whose romantic past with both Kane and with the arriving gunman convinces her to pack up and leave town. As the dreaded noon hour approaches, Kane realizes he must stand alone against the coming storm.