名声大噪的神枪手简(简·拉塞尔 Jane Russell 饰)被州长从监狱里秘密放出,作为获得赦免的条件,简接受了一项卧底任务。她要前往迪尔费尔德保找一个名叫吉姆的男人,与他假扮成夫妻,秘密接近非法倒卖军火的印第安人。可是,当简抵达了目的地后才发现,吉姆早已经暴露了身份,遭到了杀害,这也就意味着她的身份也曝光了,果不其然,简很快就遭到了敌人的追杀。 在误打误撞之中,简跳上了牙医波特(鲍勃·霍普 Bob Hope 饰)的马车,不忍心看到漂亮的姑娘落难,波特决定向简伸出援手。最终,两人不仅躲过了追杀,逮捕了罪犯,还在此过程中碰撞出了爱情的火花。Someone is selling guns to the Indians and in order to find the culprit Calamity Jane and a secret agent go undercover posing as man and wife. When the agent is killed Jane recruits a new husband -- none other than innocent dupe "Painless" Peter Potter, a totally inept dentist and confirmed coward who's main goal is to leave the barbaric west far behind. When their wagon train is attacked by the Indians it's Jane's sharpshooting that saves the day, but she gives the credit to Potter making him an instant hero to the townspeople and instant target to both the Indians and the gunrunners.