'Slim' Duane, a nomadic cowboy, finds himself compelled to swap clothes with an escaped criminal, which leads to suspicion falling on him for the murder of Sheriff Findlay. Evading the pursuing posse, he stumbles upon a gang of rustlers hidden in the hills who capture him. Meanwhile, another innocent man faces wrongful accusations and is on the brink of being executed. Slim's companions, 'Course-Gold' Charlie and his partner Anne, embark on a mission to save him.