A young field administrator for the TVA comes to rural Tennessee to oversee the building of a dam on the Tennessee River. He encounters opposition from the local people, in particular a farmer who objects to his employment (with pay) of local black laborers. Much of the plot revolves around the eviction of an elderly woman from her home on an island in the River, and the young man's love affair with that woman's widowed granddaughter.

Can a girl from Little Rock find happiness with a mature French planter she got to know one enchanted evening away from the military hospital where she is a nurse? Or should she just wash that man out of her hair? Bloody Mary is the philosopher of the island and it's hard to believe she could be the mother of Liat who has captured the heart of Lt. Joseph Cable USMC. While waiting for action in the war in the South Pacific, sailors and nurses put on a musical comedy show. The war gets closer and the saga of Nellie Forbush and Emile de Becque becomes serious drama.