The Phantom of the Range.

Duke Carlton, an actor stranded in a small western town, gets a job as a cowboy on Tim O'Brien's ranch as a reward for beating up "Flash" Corbin, a real estate agent who has been trying to swindle the rancher. A romance develops between the actor and Patsy O'Brien, the rancher's daughter, but it is interrupted by the appearance of his former stage partner, Vera Van Swank, who claims him as her husband. He clears himself of the bigamy charge, foils a plot to cheat the rancher out of a $90,000 land property, and wins the daughter's hand.