The cattle herds of some Arizona ranchers are being stampeded and stolen, so the Arizona Stockmen's Syndicate sends ace investigator Steve Reynolds in to find out who is responsible.
Government Agent Steve leases land to Masters so he can bring in horses for the Army. Henley has obtained a forged lease for the same land and Steve is unable to prove it's a fake.
The Durango Kid (Charles Starrett) returns to Ret Butte intending to sell his cattle ranch. Saloon owner, Duke Catlett (Lane Chandler) is the secret owner of a sheep flock which graze on the cattle lands--leaving them useless for cattle.
Treasury Department Steve Waring, and also, unknown to others, the Durango Kid, comes to Sunset Pass in search of $1000,000 in gold coins, stolen from the government by the late Forrest Brent.
A major Indian uprising is expected and Wyoming military posts are alerted. Colonel Dennison is meeting with Chief Eagle and his son Running Wolf when Chief Eagle is mysteriously shot.
Johnny and Banty come in contact with a cattlemen's protective organization. Ostensibly an honest venture, the association is the front for an extortion racket, headed by a gent named Carson.
Avary, himself a hustler, is jealous of his beautiful wife. He eavesdrops to catch Vilma, his wife, having supper with a neighbour on the terrace of their manor-house.
Back Trail is one of the livelier entries in Monogram's Johnny Mack Brown western series. Brown rides into a small town where he becomes embroiled in a blackmail scheme.
Jimmy and his pal Cannonball are hired by a rancher and horse breeder to capture Midnight, a wild stallion that has been interfering with local herds and has a reputation as a killer.
Lapland, Sweden. The Sami Arvi wants to marry young Aino but her mother will not give her permission as long as Arvi does not have a herd of 400 reindeer.