Jack Logan is the heir to half of a map to a hidden Indian mine. The trader and villain Jean Gregg sends his chief henchman Mack to make life difficult for Jack. Jack is aided in his quest by the heirs to the other half of the map: Helen Holt and her younger brother Billy, and by a uniformed mystery man known as "The Mystery Trooper".
Having quit their old gang and gone straight, Bert Allen and Joe Kemp finally own their own ranch after three years, but Joe robs the Riverton bank of the Green River Dam payroll - using Bert's horse, gun and gloves and leaving behind Bert's hat.
Trailing the men that murdered his father, Bob Archer finds a man in a gunfight. He helps him to escape only to be knocked out by him and captured by the Sheriff.
Sam Stallings kills and robs Lynn Durant. The Man from Oklahoma arrives and he and Stallings quickly become enemies. The Oklahoman eventually learns who killed Durant and avoiding the trap on his life by Stalling's henchman, sends his dog for the Sheriff while he goes after Stallings.
During a rescue of Mary and her father, Bob Bartlett finds a good horse, which later causes him to be mistaken for Butch Coleson, a wanted outlaw. Wounded by a posse, Bob heads for Poker Flats hoping to capture Coleson for the reward.
The constant battling over the same woman gets two detectives demoted to what's considered the toughest job in the Police Department--the Riot Squad.
'Firebrand' Jordan is a ranger sent into the high Sierras to assist the local Sheriff Ed Burns in capturing a mysterious band of counterfeiters.
With his father accused of murder, Tom heads after the real murderer who lives in a town of outlaws where no one is allowed in or out. To gain entry he poses as an escaping outlaw with his sidekick Banty posing as the pursuing lawman. This lets Tom join the gang but there is trouble later when Banty gets caught and sentenced to die.
Clinging desperately to his ranch, penniless Jack Sheldon is falsely accused of killing a sheriff's deputy, a heinous crime actually committed by crooked ranch foreman Joe Phillips.
After Wes Channing's partner, the feckless Buck Littleton, loses his half-interest in their ranch to gambler Flash Denby, Wes stands up against the sheriff's men when they try to seize the ranch-- land that has a gold mine on it. Denby tries to trick Mary Sims, granddaughter of Wes's neighbor Rufe Sims, into signing over the rights to the land. Denby's machinations are all set in order-- but Wes's right hook may prove to be a hell of a monkey wrench!
The Thunderbolt Strikes
It's time for the stagecoach race to win the mail contract and the only entries are Reden and Farrell. Reden's men kidnap Farrell's daughter and then force him to withdraw. Wally rescues Ruth, buys out Farrel, and enters the race himself. But Reden has his men planted along the course to make sure Wally doesn't win.
Bob Tyler has rustler trouble while driving a herd of cattle to the new owner, but he refuses to turn the herd over to Frank Kellogg. He has a run-in with Jean Polk, discovers she is the owner of the cattle, and is fired. With his friend, Barney McCool , Bob snoops around and discovers that Kellogg is behind the rustling.
