After stopping a bank robbery, Wayne is deputized by Hayes and goes undercover to catch criminals who are using a rodeo to cheat unsuspecting cowboys. In a horse-riding rodeo contest the bad guys try to coerce John into losing on purpose. When he refuses they add some insurance: a poisoned needle hidden just under his horse's saddle. Will Wayne survive the ride? John also manages to fall for a girl along the way who gets jealous when she thinks John is after the other girl, who in reality is an accomplice of the ring leader.