 Texas Ranger Captain Winkler (Jack Rockwell) dispatches Rangers Bob Allen (Bob Allen) and Hal Garrick (Wally Wales as Hal Taliaferro, the name he worked under credit or uncredited for the rest of his long career) to the Texas-Mexico border town of Shonto to stem the activities of a band of desperadoes operating from there.Working undercover Bob plans to enter the territory as a fugitive while Garrick goes to Shonto and tells Jim Sayres (Paul Sutton), head of the gang, that there s a thousand dollar reward for the delivery of Bob across the border into Texas.Bob hopes the gang will take him across the border, giving the Rangers a chance to capture them.Riding into the Shonto Basin, Bob meets Sanda Cullen (Iris Meredith), daughter of rancher John Cullen (John Elliott.) Later, Bob disarms Sneed (Tom London),a Sayres gang leader, who has tried to capture him and collect the reward. Sayres is impressed and makes Bob the gang leader over Sneed.Bob, in order to keep up the ruse, is forced to ride with the gang after Cullen s herd but the hacked-off Sneed warns the Cullens and the gang is ambushed. Bob escapes but is seen by Sandra who thinks he is one of the outlaws.Sneed sees Bob and Garrick together, tells Sayres and they make a plane to trap the two Rangers.