The foreman of a ranch owned by a pretty young girl captures a herd of wild horses, but the herd's lead horse manages to break them free. The foreman blames a drifting cowboy, Yak, for the break-out. Yak, however, seems intent on provoking a confrontation with the foreman at every opportunity--and, as it turns out, for good reason.
Jack Meadows and sidekick Toby are looking for whiskey smugglers along the Canadian border. They find a badly wounded Seriff who earlier caught one of them and a nearby hoofprint of a horse with a broken shoe. Setting up a blacksmith shop, they soon find the owner of that horse and replace the shoe with another that will let them trace him.
Bob rides into a border town where he runs into trouble with Lambert and his gang. Herb arrests him claiming he is the outlaw El Diablo. But it was just to save him from Lambert's gang and the two now plan to trap the outlaws.
Hester and Hezekiah plan to get Dorothy Horton's inheritance. But when Pete and his men rob the stage they learn of the scheme and send Jim to replace Hezekiah. The Deputy Marshal breaks this up but Black Pete arrives wearing the Marshal's badge and has the Sheriff take him away while he flees with the inheritance money.
The election to determine if Texas will become a state is near and men opposed are running contraband across the border. Sunset and Frog are Border Patrolmen and have an agent that tips them off by carrier pigeon. The Army arrives and the commander is Sunset's brother. When the agent is found out and murdered, his fake replacement then leads the soldiers astray.
Photographed by famed cinematographer Laszlo Kovacs just before embarking on EASY RIDER (1969), Mark of the Gun is a classic western tale of outlaws and the women they love.
Rodeo star forms a strong bond with the noble horse he took from the wilds and trained. Unfortunately, they end up on different life paths and are separated. When at last they are reunited, the cowboy is appalled to discover that Smoky has become a broken down cart horse with an appointment at the local abattoir. Fortunately the cowboy intervenes and saves the horse from death
U.S. Marshal Whip Wilson (Whip Wilson) decides to take a vacation and visit his old friend Winks Grayson (Andy Clyde), the ex-sheriff. Upon his arrival Whip learns of Winks' suspicions regarding newly-elected Sheriff Tanner (William Ruhl as William H. Ruhl), and the story of a frame-up of Paul Davis (Ted Adams) and his son Bud (Riley Hill), now being released from prison. Following a holdup and a killing, a band of outlaws hide at the Davis ranch, implicating them again. Paul is hot and Bud goes to jail. Whip and Winks work to clear Bud and expose the real leader of the outlaw gang.
Virginia - a young Chinese woman in the old west - rescues her long lost sister, Mattie, from a brothel in Arizona. On their journey home to San Bernardino, they discover the strange, steaming wreckage of an otherworldly craft. Inside the vehicle, Mattie finds a very mysterious baby.
Bill Ralston arrives in town planning to settle down but quickly gets caught up in the fight between the townspeople and Poe Daggett and his gang. He takes the job of town Marshal and soon brings law and order. When Daggetts men ambush him he kills Poe's brother. Poe then kills Bill's friend Brant and this leads to the showdown.
The Transcontinental Broadcasting Company sends a sound truck and equipment to a ranch to obtain an audition from "Santa Fe" Evans and his musical cowboys (Oscar Gahan, Lloyd Perryman, Robert "Curley" Hoag, Rudy Sooter and Sherry Tansey.) Carver, arch enemy of Evans and a rival for the love of Carol Sheldon, fails in an attempt to spoil the audition. Carver frames Mr. Sheldon and Carol's brother Buddy on a charge, by Al Jensen, of receiving cattle stolen from him by Evans. Carver blames Evans for all of the Sheldon's troubles and, what with one thing or another, it looks like Evans and his cowhands will miss the big broadcast.
A rancher, smitten with a pretty young girl he meets, hires himself out to her as a chauffeur, only to find out that she's on her way to his ranch. In order not to look foolish he keeps up the pretense, but his crooked ranch foreman eventually brings matters to a head.
The drought-plagued ranchers of Sundown have to market their cattle at a loss in order to meet mortgage payments held by banker Cylus Cuttler. Then, Sheriff Tex Rockett is forced to quarantine all the cattle on the local ranches because of a hoof-and-mouth disease outbreak. Steve Davis herds his cattle to the railhead anyway, and Tex is forced to arrest him. Urged on by the banker's son, Nick Cuttler, the angry ranchers storm the jail, but Steve's sister Bee persuades them to await the trial. Steve, with Nick's help, breaks jail and is told he must kill Tex to aid the ranchers. Meanwhile, government man Bret Stockton and Tex see Nick and his men treating cattle in an unusual way. Tex finally proves that the Cuttlers have been treating the cattle with acid to give a false impression of the hoof-and-mouth disease.