Roy is an oil prospector. His efforts to get drilling rights on an old Spanish land grant are countered by gamblers from an off-shore gambling boat determined to control the land (and oil) themselves.
Notorious shootist and womanizer Quirt Evans' horse collapses as he passes a Quaker family's home. Quirt has been wounded, and the kindly family takes him in to nurse him back to health against the advice of others. The handsome Evans quickly attracts the affections of their beautiful daughter, Penelope. He develops an affection for the family and their faith, but his troubled past follows him.
Gene Autry is back near the saddle, trying to help out a crippled jockey. Gene is certain that the jockey can ride in the Big Race if the lad can regain his self-confidence. Meanwhile, Gene and comical sidekick Sterling Holloway have another problem on their hands: A rogue stallion has "kidnapped" Gene's prize mare. Piloting a plane, Autry seeks out and locates the stallion.
Caxton has broken out of prison and Eddie has been sent to bring him in. Caxton is known by the polka dot band on his hat and Eddie has Soapy wear one like it. This gets Soapy arrested as soon as he rides into town but it leads Eddie to Varney and he realizes Varney will lead him to Caxton.
Chasing women and staying one step ahead of the law, the Cisco Kid meets Raquel and then Dolores. He sees that Raole is the boy friend of Raquel but engaged to Dolores. Learning that all her money will got to her uncle Don Jose when she marries Raole, Cisco suspects a plot and sets out to unravel it.
Lambert has the stagecoach wrecked killing the Commissioner so his phony replacement can alter Coonskin's land survey. When Red Ryder exposes the survey hoax, Lambert has his stooge Sheriff put Red in jail.
Roy Rogers, a Nevada State Ranger Captain in charge of the Rangers Reclamation Service, makes a trip to Las Vegas for the annual Heldorado Frontier Days Festival, as he wants to help his old friend Gabby Whittaker who originated the idea (at least, in this film).In Las Vegas, Roy meets heiress Carol Randall, who has been selected as the Queen of the Heldorado. Roy is informed that the F.B.I. wants an immediate investigation of the counterfeit thousand dollar bills that are being passed over the gambling tables at the casino.
Rancher "Utah" Neyes crosses the border into Canada to meet his partner, only to find that the latter has been murdered by a gang led by "Nails" Nelson. "Utah", with the aid of RCMP Jack Craig and fur-trapper Ivy Jenkins, manages to clear his own name of suspicion and also break up Nelson's fur-stealing and smuggling racket.
In Old California, a young Frenchman transporting a chest full of silver travels by stagecoach to San Marino, to complete a complex business deal. The stagecoach is ambushed by a band of men whose leader, a mysterious bandido known as Cisco (Gilbert Roland), claims the silver is money that was extorted over a period of years from the poor people of California. The bandits take the money and escape, but Cisco stays behind with the Frenchman -- who, it turns out, is actually a lovely mademoiselle, Jeanne DuBois (Ramsay Ames). She follows him to the bandit's lair, where Cisco tells her he intends to return the stolen money to the poor people. The two rivals are irresistibly drawn to each other, however, and as a token of love Cisco offers to return the money to Jeanne instead. Now she must decide whether to complete her business deal, or to comply with Cisco's wishes and redistribute the wealth.
In this Roy Rogers entry, featuring a song written by Oklahoma Governor Roy J. Turner (making him and Lousiania's Jimmie Davis and Texas' W.E. "Pappy" O'Daniel possibly the only state governors to write songs used in a western), Flying U ranch owner Sam Talbot is killed by a fall from a horse. St. Louis reporter Connie Edwards comes to check a rumor that he might have been murdered. She goes to Roy Rogers, editor of the local newspaper, and he takes her to the reading of Talbot's will. The ranch is left to Talbot's 12-year-old ward, Duke Lowery, much to the dismay of Talbot's niece, Jan Holloway. After some attempts on Duke's life, Roy finally proves that Jan, Steve McClory and coroner Jim Judnick had Talbot killed and are conspiring to do the same for Duke, making Jan the last heir.
To get the Delaney ranch Cole's henchman Anders has started a phony range war between the cattlemen and sheepmen. After killing Delaney, he tries to kill his daughter Jill and then Roy who was sent to investigate the war. But the failed attempts gives Roy the information he needs.
Rodeo star Roy Rogers returns home to find that his old friend Tom Craig has been murdered after he was accused of stealing a family crest from Helen Williams. Helen joins up with Roy and Gabby Whittaker to find the killers and the crest.
The big bad cats are the villains/Indians, and the little mice are the settlers going west in their little covered wagons, and the Indians are on a rampage about it. Things look dark indeed for the settlers when the likes of Buffalo Bill, General Custer and Daniel Boone are unable to defeat the attacking cats but...wait...up in the sky...here comes the singing, flying mouse...Mighty Mouse. Not recommended for Revisionists.
A dance hall girl is murdered and her body robbed of a quantity of gold obtained illegally. The killer flees into Death Valley and encounters the rightful owner of the gold and her sweetheart.
Gabby doesn't want to breed his horse the Golden Sovereign with Roy's. When Sovereign and Roy's horse escape, the Sovereign gets shot accidentally by Skoville but Roy is blamed and jailed. A year later Roy returns with Trigger, the son of the Sovereign. When Skoville reveals he was present when the horse was shot, Roy sees an opportunity to clear his name.
A young outlaw gets involved with a gang of crooks. When he tells them he is breaking away, they threaten to pin a false murder charge on him. But he is rescued and reformed by his sister, and an undercover agent for the express company.