A young boy donates his pet, a police dog, to the army to be trained as a war dog.
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.
Billy Donovan arrives looking for his sister's killer. When he hires on at the Halloran ranch where the mysterious Phantom has killed all the hands, it's not long before the Phantom shoots him.
Cowboy Larry O'Day and his sidekick Lucky Smith happen upon a distraught Barbara Hartwell, who is about to be arrested for the murder of her uncle. With Barbara behind bars, Larry is determined to find the real killer and soon finds himself in the middle of a mystery involving crazed German entomologists and a smuggling ring bringing Chinese "picture girls" across the Mexican border for sale to wealthy Chinese bachelors.
A young reporter's grandfather wins a sweepstakes, but it turns out that his ticket is phony. The reporter finds out that the police are looking for the criminal ring responsible for the phony-sweepstakes racket, so he and his young brother set out to track down the gang responsible and expose them.
The Range Busters have a plan to get into the outlaw's hideout in Fugitive Valley.
After Jim Blake saves Harve Tarlton's life, they become partners in a gold mining claim. After a while Harve reverts to his outlaw way of life. Everyone but Jim seems to know that Harve is bad but Jim merely thinks he needs a chance to go straight. But Jim's wife Helen has a plan to expose Harve as the outlaw he is.
Bolton's men blow up the wagon carrying the mine payroll and Marshal Crash Corrigan is supposedly killed in the explosion. A man finds his badge and gives it to Bolton. Thinking Crash dead, Bolton gives the badge away and it ends up with the Sheriff. Crash is OK and the Range Busters know Bolton is the head of the gang but that he gets his orders from someone else and that is the man they want.
Doran and the Sheriff have a scheme to bring in an outlaw gang. Doran is sent to prison so he and the gang leader Mitchell can break out. This gets him into the gang but he is in trouble when it's revealed he is working with the Sheriff.
When a gang of outlaws led by Faro Wilson starts swiping payrolls and terrorizing the residents of a small Western town, courageous Range Busters Crash, Denny and Alibi gallop onto the scene to set things straight.
In the midst of some friendly horseplay on their "Flying R" ranch, the Range Busters, Crash Corrigan, Dusty King and Alibi Terhune, are sobered by the arrival of a buckboard bearing their old friend Larry Meadows and his niece Dorrie Willard. Meadows seeks their aid against a gang of outlaws terrorizing his town. Ernie Willard, Dorrie's brother, has been taken in by Tex Laughlin who is using the Willard ranch as an undercover for his real occupation as a member of a gang of outlaws led by Tim Douglas, a supposed friend of the Willards.
Gold stages are being held up in the far west at a time when the U.S. government needs bullion, just before the famed "Black Friday" attempt to corner the gold market.
Someone wants to kill Magpie Harper. Crash and Dusty arrive too late, Magpie Harper is allready dead.
On the eve of his execution, a vice-rackets bigshot recalls his various exploits in crimes such as abortion and white slavery, in which he frequently operated under an alias.
