When attacked by two dogs, Joe Gilmore leaves them on the desert to die. Later one of the dogs saves John Blake from drowning. Men arrive claiming the dog is killing their chickens. They want to kill the dog but John convinces them the dog's fate should be determined by a trial.

Reb Russell (Reb Russell), undercover agent for the Cattleman's Protective Association, goes into the stronghold hideout of rustler chief Bull Thompson (Fred Kohler) posing as an outlaw. He falls in love with Marion, Bull's step-daughter. Juan (Dick Botiller), a gang member once jailed by Reb, reveals Reb's true identity, but he will be given his and Marion's freedom to leavy the valley if he can beat Thompson in a fight. He does, but Butch Greer (Jack Rockwell), a gang member trying to take over from Thompson leads the gang after the pair, after first revealing to Thompson that Reb is Thompson's own son, whom he last saw as a baby when Thompson, then known as Big Bill Russell,was forced to flee the law. Thompson and loyal gang member Blackie (Edmund Cobb), who was once helped by Reb, go after the gang in an effort to help Reb and Marion escape.

Marshal Reb Russell's reputation precedes him and when he arrives the outlaw gang that includes the Sheriff and that has been doing all the rustling, captures him and plans to hang him. Tommy Lord, the man the crooked Sheriff wants for the rustling, helps him escape. Posing as a rustler he gets the Indian Agent to admit he is the buyer and to reveal who the rustlers are. Having cleared Tommy of the rustling charge he goes after the gang.

Cattlemen Protective Agent Reb Russell arrives to try and stop the cattle rustling. He gains a friend when he saves Jack Thorn from Lenahan and his men. They hire on at the Lund ranch and when her cattle are rustled and she is kidnaped they follow the trail, It's Lenahan and his gang and Reb soon finds himself a prisoner.

A lady reporter and two college students search for the "Gold Special," a train that disappeared without a trace.

A cowboy recently released from prison is determined to go straight, but he winds up in a tough western town where he finds trouble everywhere.

After Slug Raton takes Brady's horse, hat, and gun, the Sheriff arrests Grady thinking he is the outlaw. Slug's men chase them to Ricard's ranch which they burn. After Grady saves the Ricard's from their burning house, Betty Lou saves Grady from hanging at the hands of the masked vigilantes. Grady recognizes the voice of Raton among the vigilantes and now knows who to go after.

The daughter of a notorious cattle thief falls for a stranger at a dance. The stranger is really a lawman who is after her father.

A rancher, frustrated with constant cattle rustling and the inability of the local sheriff to stop it, is accused of murder when the sheriff is found dead.

A rancher is murdered after discovering that 40 head of his cattle have been rustled. A neighboring family is accused of the crime and flees across the border, then tries to find the real killers to clear their name.

A cowboy steps in when cattlemen try to force a sheepherder off the range.