The story takes place in Texas in the 1890s and begins with a train robbery staged by Louise (Brigette Bardot) and her four sisters. Among the loot is the title to the Little "P" ranch, which just happens to be located on a field of unexplored oil next to the property of Marie Sarrazin (Claudia Cardinale) and her four brothers. Louise and her sisters decide to give up the life of crime and settle down on the Little "P' ranch, but are harassed by Marie and her kin who is determined to force them out and acquire the old-rich property for herself.