Outlaw siblings Frank (William Elliott) and Jim Plummer (Forrest Tucker) go their separate ways: The former becomes a railroad security guard, while the latter devises a daring plan to burglarize a train. At first Joe thinks his brother took the job to help him pull off the heist, but he soon realizes that Frank actually intends to stop the robbery. And when Joe's bride-to-be, Kate (Adrian Booth), cleans up her act and sides with Frank, their brotherly tug-of-war only intensifies.