1943
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.
1942
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.
Hammond is after the Craig ranch and has framed Charlie Craig for murder. Mother Craig brings in the Range Busters. They capture one of Hammond's men and Alibi plans to trick him into a confession as to who the real murderer is. Meanwhile, Denny has overheard Hammond's plans for his next move and he and Crash set out to round up the gang.
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.
The Range Busters are together again to try and stop a swindle.
1941
Someone wants to kill Magpie Harper. Crash and Dusty arrive too late, Magpie Harper is allready dead.
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.
The Range Busters are investigating a gold robbery from the Denver Mint in a supposedly deserted ghost town, but they soon find they're not the only town resident with a nose for gold.
Both the Range Buster and Rance and his outlaw gang are looking for stolen gold bullion. To scare people away from the ranch where the gold is hidden, Rance has his man imitating ghosts. The gold is in a steel cased organ but a certain combination of organ stops need to be pulled to obtain the gold.
Number 10 in Monogram's series of 24 "Range Busters" westerns, Crash Corrigan, Dusty King and Alibi Terhune, the Range Busters,enlist in Teddy Roosevelt's Rough Riders during the Spanish-American War, but are mustered out and sent to Wyoming to clean up a cattle-rustling situation that is affecting the Army's meat supply. Arriving in North Butte, Crash's home town, they all get separate jobs. Jane Blanchard, a reporter from the Denver Daily, also arrives in town in search of a story, and is posing as a waitress. They learn that Jeff Miller is behind the huge combine of rustlers, but Miller also learns that they are the Range Busters and are on his trail. He and his henchmen engage the out-numbered Crash and Alibi in a fight, but Dusty stampedes a large herd of Miller's stolen cattle into the midst of the fray.
1940
When Moreland's henchman attack Bob Horner the Range Busters break it up. Horner dies but they get the baby Moreland was after. He must have it to become it's guardian and take control of the Horner ranch. When the henchmen catch up with Alibi, they take the baby cradle not realizing Alibi has substituted his dummy Elmer. Crash having evidence Moreland is the one they want, now has a plan to expose him.
Attracted by a picture of Maybelle Pembroke, the Range Busters, bantering between themselves, head for the Pembroke ranch separetely. Crash arrives posing as a dude while Dusty arrives posing as Crash, a mixup having put his picture in the paper identified as Crash. Later Alibi arrives and the three go to work when outlaws trick the Pembroke ranch and it's neighbor into a gunfight with each other.
