A government agent is sent to a tough frontier town to arrest & bring back one of the most ruthless criminals in the region.

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".

Bob Merril, looking for the killer of Buddy's father, has found the secret entrance to Pecos' hideout. There he captures Indian Joe who confesses that Marsdan was the killer, But while Bob is off riding in the rodeo his witness escapes.

Barely out of prison, Jim Regan is arrested once again, this time for the attempted shooting of Denver Dan Norris, the villain who framed him in the first place. With the assistance of his young friend Wally Weston Jim is released once again on the condition that he won't leave town.

Bob Haynes, the unknown leader of an outlaw gang, has been offered the job of Deputy. When his men commit murder and robbery against his orders, he takes the job and brings them in. He then confesses he was one of them and the Sheriff is forced to arrest him leaving his fate up to the Judge.

Mysterious cowboy Bill Patton (as Bob Norton) arrives, "in the land of the West - on the banks of the Rio Grande," at the "Bar-V" ranch. Ostensibly seeking employment, Mr. Patton is revealed, as the plot unravels, an undercover Texas Ranger. Patton wants to get a job at the "Bar-V", and round-up evidence against newly appointed foreman, and all-around snake-in-the-grass, Jack House (as "Buck" Bailey).

Harley P. Hennage, town gambler, takes under his protection Dana Corbaly when her widowed mother dies. He becomes suspicious of the motives of Bob McGraw, a young engineer who has come to town to investigate the mining claim of Dana's father, John Corbaly. But events reveal that he is only the tool of Corbaly's former partner, capitalist T. Morgan Carey.

At the palatial home of a merchant the latter's wife entertains her husband's friends. The guests have all departed save one, the husband's most intimate and trusted friend. That this man should abuse the confidence of his friend and attempt to force his attentions upon the wife was a thing the merchant deemed little call to fortify against.