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.

Gene and Frog arrive with a herd of horses for Gene'e brother, a diamond prospector whose work has attracted the interest of a bunch of badguys.

In the 18th entry of Monogram's 24 "Range Buster" films, the bank of Gila Springs is robbed by Ace Alton and his gang, and Sheriff Frank Hammond, son of Marshal Jim Hammond, is killed. The Marshal sends for the Range Busters, Dusty King, Davy Sharpe and Alibi Terhune, to come and restore order to the town. Ed Cole, head of the local vigilantes, and secretly the head of the outlaws, promptly orders the trio out of town. They visit an old friend, Rancher Mike Rand and his daughter Mary. Mary's brother Jeff has unwittingly become a gang member, and carries out Cole's orders by taking a shot at Davy, but the latter makes him a prisoner during a subsequent fight in the town café. Jeff confesses to Cole's involvement, and the Range Busters, with the help of town banker Harrison, set a trap for Cole and his outlaw vigilantes.

After Pat Garrett kills Billy the Kid, Billy's look-alike Roy Rogers arrives and is mistaken for him. Although a murderer, Billy was on the side of the homesteaders against the large ranchers. As Billy's death is unknown, Roy gets Garrett to let him pose as Billy to continue the fight, but without the killing.

A crooked real estate manipulator sells worthless land on mortgage to flood refugees, then tries to profit by reselling the land to the state, committing murder in the process, as the Three Mesquiteers work to bring him and his gang to justice.

In his starring debut, Roy gets elected to Congress in order to bring water to the ranchers in his district. In Washington, he learns he needs the backing of a key congressman and gets that man to go west for an inspection trip. When the congressman is initially unimpressed, Roy gets the inspection party stranded without water to show the true conditions.

Wanted by the law in New York, Dr. Steve Kells heads west and arrives in an area controlled by an outlaw gang known as the Border Legion. When the gang's boss is wounded, they kidnap Kells and force him to remove the bullet. Not allowed to leave and being a wanted man, he joins the gang. Now wanted as a gang member also, he nevertheless plans a raid that will lead the entire gang into a trap.

Trouble in Colorado is tying up Union troops needed back east during the Civil War and Lieut. Burke is sent to investigate. Macklin and his gang are causing the problems and Capt. Mason joins them. When Burke catches up with them he also finds Mason, his brother.

While Sam Houston in in the nation's capital trying to get Texas into the Union, his aide is trying to impose a self-serving tax on the use of the Santa Fe trail. The lady owner of a wagon train is using the trail, and a Texas Ranger comes to her assistance.

The Carson City Kid and partner Laramie are outlaws. When his partner is caught the Kid, his identity being unknown, takes a job in Jessup's saloon. Here he see Jessup cheat Waren out of his money. Warren then robs Jessup posing as the Kid but gets caught. To gain his freedom, Laramie identifies Warren as the Kid. Realizing Jessup is the man that killed his brother, the Kid must find a way to clear Warren and get Jessup.

Roy is a newspaper reporter. He goes to Cheyenne to cover the activities of supposed bad guy Arapahoe Brown. Roy, of course, discovers who the real bad guy is.

Roy Rogers takes on crooked wartime profiteers in the musical western Ridin' Down the Canyon. Posing as solid citizens, the crooks spend their evening hours stealing horses from local ranchers, then selling the steeds to the government at exorbitant prices. The head of the bad guys runs a dude ranch where Rogers and his pals (The Sons of the Pioneers) are employed.

Bad guys plot to trick a newly arrived Eastern girl out of a ranch which belongs to her infant ward. Roy, of course, saves the ranch for the girl. Songs include "I'm Headin's for the Home Corral," "He's a No Good Son of a Gun," "Sandman Lullaby," "Song of the San Joaquin," and "I'm a Cowboy Rockefeller."

A meddlesome reporter sporting a young bride takes on a gang of modern day cattle rustlers. Donald "Red" Barry plays Dan Reilly, a newspaper reporter just returned to LA with his wife, photographer Margie (Marjorie Steele). Margie insists on taking pictures of everywhere they go, and so as she's walking into a butcher shop she poses for Dan - while at the same time three thugs make their way quickly out after beating up the proprietors. Soon Margie and Dan are involved in investigating an illegal meat operation that rustles cattle and forces butchers to buy it - or else. Dan gets beaten up a couple of times, but is undaunted in pursuing the great story - and hey, he's only got 64 minutes to do so, he'd best get cracking!

Postal inspectors track down money stolen from a railroad car.

Drummond's girlfriend is kidnapped by his enemies and he along with his friend Nielsen, an inspector from Scotland Yard, follow the trail and try to rescue her from the kidnappers.

Chet Kasedon is after the Indians hidden gold mine but Chief Moya will not reveal it's location. He has also hired mining engineers Gale and Mortimer to locate the mine. When Gale sees Kasedon's cruelty to Moya, he switches sides.

Gene and Frog set out to find out who has been causing the accidents at a dam construction site.

Although Larry "Buster" Crabbe earns top billing, the hero of Drift Fence is former Western star Tom Keene as Jim Travis, who, at a rodeo, meets city dweller Jim Traft, who has come west to erect a fence that will prevent Clay Jackson from continuing his cattle rustling business. A tough Western type, Travis suggests that he impersonate Traft and the building of the fence soon begins. But Travis is opposed by Slinger Dunn and his family, whose small ranch will suffer from the division of the land. A romance between Travis and Slinger's sister, Paula, paves the way for a meeting of the minds, however, and Slinger switches sides completely upon learning that Travis is a Texas Ranger in disguise.

A lawman captures the notorious "Pecos Kid", who is tried and hanged for his crimes--then starts to have doubts as to whether the Kid actually committed the crimes.

Spectacular stunt work by Richard Talmadge, circus acrobat and stunt man for Douglas Fairbanks, Sr., highlights this expose of a big city criminal mastermind.

A Professor has an invention that will bring down planes causing them to crash and Dawson is forcing him to use it on those carrying money. When Tim arrives to investigate he is mistaken for a noted outlaw. So he assumes that identity to force Dawson to make him a partner. But just as a plane bringing Tim help is arriving, his true identity is revealed and while he is a prisoner, Dawson forces the Professor to start his machine.

Rodeo star John Scott and his gambler friend Kansas Charlie are wrongly accused of armed robbery. They leave town as fast as they can to go looking for their own suspects in Poker City.

Two rival newspapers are engaged in a circulation battle, complicated by the fact that a vicious gangster inserts himself into the middle of it. Also complicating matters is that one newspaper's editor and circulation director are competing for the affections of a pretty blonde reporter.

Summoned by Ed Oliver, Jim Hale and sidekick Fuzz arrive at Oliver's ranch to find a range war in progress. Unknown to Jim, Ed Brady has kidnapped Oliver and replaced him with a stooge. Brady is after the Green ranch and Jim and Fuzz now set out to help Helen Green.

"Nevada" and "Weary" Pierce hijack the loot taken in a bank hold-up by Les Setter, and his gang. They escape from Sheriff Jim Henry Warner. U. S. government horse-buyer David Ward is killed by Settler's men and Settler takes his papers and goes to the ranch of Blaine and asks for the horses Ward was to buy, promising payment from the government later. He also takes an interest in Ina Blaine, much to the resentment of her sweetheart Ben Ide. "Nevada" and "Weary" are hired for the horse round-up but Setter has them and Ben arrested on a fake charge.

Sheriff John Higgins quits and goes into prospecting after he thinks he has killed his best friend in shooting it out with robbers. He encounters his dead buddy's sister and helps her run her ranch. Then she finds out about his past.

John Wyatt is a government agent sent to smash a counterfeiting operation near the Mexican border. Joining Doc Carter's medicine show they arrive in the town where Curly Joe, who once framed Carter, resides.

Jim Cole, heir to a mining operation, takes over the mine, which is suffering from unexplained low production, and is facing a strike by the miners. Jim will soon loose the mine if production doesn't increase and the sabotage continues. Mary Norsen, office-secretary, accidentally learns of a plot by Fred Johnson to wreck the mine and force Cole to sell his coal-mine. She and her brother, Joe, join Cole in his fight to stop Johnson.

Stony's brother George has been accused of murder and the Mesquiteers have returned to prove his innocence. But they find that Harvey rules the town along with his stooge Sheriff Gray and that George won't get a fair trial.