Mary Robbins is a moderately educated, beautiful, young woman who owns the saloon called "The Poker". She is the only woman in the town of Couldee - making her the fancy of all the men there, especially to Sheriff Jack Rance. On the way to Monterey to sing at a mass officiated by Father Sienna, her stagecoach is held up by the infamous masked bandit, Ramerez. He too takes a fancy to Mary, and decides to secretly follow her, taking on the identity of an officer named, Lieutenant Johnson. While in Monterey, he dances, sings and courts Mary, who has now fallen in love with him. He then has to make a quick getaway. In the mean-time, Sheriff Jack has set up a trap to catch Ramerez at "The Poker". When Ramerez does arrive he soon discovers that Mary is the owner, and quickly changes to the identity of Lieutenant Johnson. How long can this charade last?