Protecting himself in an attack by rustlers, Rancher Steve Holden believes he has killed one of the attackers, young Bud Mathews, who in reality has warned Holden of the rustlers' approach. Unaware that Mathews was actually killed by rustler boss Cass Barton, Holden heads out to Mathews' home town where he plans to tell the boy's family of his death but instead uncovers a plan by a local businessman to force Mathews' father out of his ranch.

Twin brothers Bob and Don Ramsay are on opposite sides of the law. Bob is the Sheriff and Don is the famous outlaw the Black Bandit. When the Black Bandit strikes, he is seen and his look-alike brother Bob arrested. Refusing to implicate his brother, Bob escapes and heads after Don.

A Treasury Department engraver is being held captive by a counterfeiting gang that wants him to make counterfeit plates for them. A lawman is sent to rescue him.

Learning of Walters' inheritance, Larson kills him and assumes his identity. When Larson's men try to kill Walter's niece Lola, Jack Lane breaks it up. This leads to a showdown with Jack outnumbered by Larson and his gang. Having saved Loma's life earlier, he has Fuzzy ride for him and his men.

Jimmy Wakely and his sidekick "Lasses" White run into trouble as they attempt to hire some cattle cars on the Cattleman's Railroad to take their herd to market. Rancher Joseph Colton has bought up all the cattle cars and intends to purchase the penniless line from principal stockholder Gywnn Randall. She is eager to sell to Colton but doesn't realize that he intends to force all the ranchers out of business once he has control of the line.

When two US cavalrymen transporting a gold shipment get killed, US Army Intelligence investigator John Haven goes undercover to a mining and logging town to find the killers.

Overland mail riders Jack Mason and his pal, Porchy, learn that an Indian uprising is imminent because one of the tribe has been murdered by a gang of outlaws. The primary town of the mail route is also being used as a hideout and base of operations for a gang of counterfeiters led by Joe Polini. Jack and an undercover federal agent, Duke Evans, round up the counterfeiters and turn Polini over to the Indian Chief as the killer of the brave.

The mysterious Don Del Oro ("Lord of Gold"), an idol of the Yaqui Indians, plans to take over the gold and become Emperor. Francisco was put in charge of a legion to combat the Yaqui tribe and protect the land, but when attacked Zorro came to his rescue. Francisco's partner recognized Zorro as the hidalgo Don Diego Vega, then ask him to take over the fighting legion as his alter-ego Zorro.

The Three Mesquiteers convince a group of settlers to exchange their present property for some which, unbeknownst to our goodguys, is going to be worthless. They are captured before they can warn the ranchers.

An orphan whose father has been killed by bandits inherits a mine. Cisco saves the mine and the child and also finds the child's real mother.