Michelle、Irene和Barbara是被派往一家贫民窟的诊所做护士的修女。为了更好地融入社区，她们以便装示人，隐瞒了修女身份。在诊所，她们结识了主治医生John Carpenter。行医救人的过程中，三位修女分别遇上了各种挑战，教堂的刁难、邻居的误解、街头大佬的霸凌以及背景复杂的病人都让她们的新生活麻烦不断。更棘手的是，Michelle和John间暗生情愫。面对信仰和本能，她们该如何抉择？
本片是猫王最后一部剧情片，猫王在片中饰演了一个和贫民窟居民打成一片的好医生，日后的金球奖得主玛丽·泰勒·摩尔则饰演了和猫王坠入情网的修女Michelle。

Ross Bodine and Frank Post are cowhands on Walt Buckman's R-Bar-R ranch. Bodine is older and broods a bit about how he will get along when he's too old to cowboy. Post is young and rambunctious and ambitious for a better life than wrangling cows. When one of their fellow cowboys is killed in a corral accident, Post suggests a way into a better life for himself and his friend: robbing a bank. Bodine reluctantly joins in the plan and the two contrive to rob the local bank. They make good their escape initially, but Walt Buckman and his two sons, John and Paul, are incensed at this betrayal by their own trusted employees. John and Paul set out to bring Bodine and Post to justice.