The owner of a stagecoach line is about to lose his mail contract after 30 years because he's been underbid. His competitor is actually a crook who's planning to hijack the stagecoach and rob the mail--and, for good measure, have a go at his rival's pretty young daughter.

A card sharp steps in when a Mexican family's ranch is threatened by swindlers and cheats.

Cowboy infiltrates an outlaw gang to expose their rackets, but after he's ordered to kidnap a young girl, the gang finds out who he really is.

A man escapes from prison, then joins up with a gang of stage robbers while at the same time working as a deputy in a distant town, hoping to ultimately find the outlaw who killed his father during a robbery years ago.

A cattleman's association hires a range detective to track down and capture a notorious rustler known as El Lobo.

Perrin is a cowboy who comes to the aid of local Indians being swindled out of their gold. He signs on as a ranch foreman, but learns the ranch is the home of the crooks.

A cowboy comes to the aid of a lady rancher threatened by Mexican bandits who believe there is a treasure buried on her land.

Chasing jewel thieves, Captain Carson and Magpie head for the border where Carson, posing as a Chinaman, opens a store that buys jewelry. To flush the thieves into the open, Carson wins all their money at poker. They agree to sell him the jewels but plan to kill him and keep both the jewels and the money.

Sayres and his outlaw gang operate out of a town just across the border and out of the jurisdiction of the Texas Rangers. Ranger Bob Allen is sent across the border where he poses as an outlaw hoping to lure the gang back into Texas. He gets into Sayres' gang displacing the gang boss but the disgruntled ex-boss is able to expose the hoax and Bob is made a prisoner.

A cowboy drifting around the border gets mixed up with Mexican revolutionary gun smuggling when he becomes friends and rivals with the chief smuggler.