 New York gangsters, Mack (Roger Williams) the leader, Looey (correctly spelled as Looie and not Louie & played by Phil Dunham),Dopey (Ralph Peters) and Don (Oscar Gahan), who specialize in the protection racket, go west to ply their trade among the ranchers. Henry Hess (Frank Hagney), head of the Federal Investigation Department (and not called the FBI in this film) receives a call for help fom his brother Tim (Ed Cassidy), one of the many rancher/victims of the gang. Hess sends the FID s best man, Bob Blake (Jack Perrin.) At the train station Blake meets Tim s daughter Jean (Ethel Beck), her uncle Joe Hess (Earl Dwire), her baby brother Tim (played by director William Berke s son billed as Baby Lester) and Braveheart the police dog. Blake, posing as a vacation visitor, arranges to stay at the Hess ranch.They ride there in Uncle Joe s car. En route they see Al Romero (Ray Henderson), an Hess employee who has stolen the payroll, being chased by Tim.Blakelassoes Romero out of the saddle.Tim recovers the stolen money and also the stolen white horse he was riding, Starlight, Blake s horse that had been shipped ahead to the ranch by Hess.Rancher Scully sends notice that the gangsters (one of the very, very few westerns in which the henchmen can be called "thugs" by those who don t seem to know that the term used, by the producers, writers, directors,players and the printed cast in westerns is "henchmen") are on the way to his place. Bob, Tim and Dave (David Sharpe) ride to Sully s place before the gangster thugs arrive.Meanwhile, in an effort to pad the plot and running time, Bobby Hess (William Lester Berke as Baby Lester which some source now thinks the acutal name is Wm.Lester Berke because they evidently don t understand that Wm. is William abreviated) wanders off and Braveheart the dog (Braveheart) trots around awhile and finds him.Later, the gangsters stampede a herd, shoot Dave and capture Blake and leave him tied up in a cabin with Dopey and Don as guards. Starlight rushes Dopey and runs him off, while Braveheart assaults Don and chews Blake s bonds loose.Blake mounts Starlight, takes a a shortcut and overtakes Mack and Looie (spelled Looie) in their car.