Joan Crawford and Johnny Mack Brown star in this high budget horse opera from M-G-M. She is Joan Prescott, a spoiled debutante en route to the family ranch in Montana and he is the cowboy she meets and marries after impulsively departing the train at a whistle stop. Surprising everyone, Papa Prescott (Lloyd Ingraham) is only too willing to welcome Larry Carrigan (Mack Brown) into the family, Larry being exactly the opposite of the slick society swells that Joan usually dates. But our Joan just can't help cutting the rug with old beau Jeff Pelham (Ricardo Cortez) and a jealous Larry slugs him. An angry Joan hops the next train back to New York but suddenly finds herself a victim of a gang of outlaws. A gang that seems mighty familiar! Co-written by executive producer Irving Thalberg's sister Sylvia, Montana Moon comes complete with songs by house composers Arthur Freed, Nacio Herb Brown and Herbert Stothart, including "The Moon is Low," "Happy Cowboy" and "Let Me Give You Love."