Pat Brady

US Border Patrolman Roy Rogers is assigned to prevent a herd of diseased cattle from crossing over from Mexico.

Judge Kirby is being blackmailed and forced to let outlaws go free. He was once the partner of Roy's father and when Roy reads in the paper that he is in trouble he heads out to help him. Arriving, Roy quickly realizes he has been mistaken for one of the outlaws and is not wanted in town. However he stays, and now posing as that outlaw, hopes to learn who is causing all the problems.

Sea Captain Windwagon Smith hits Westport, Kansas, the starting point of the old Oregon and Santa Fe Trails, and is quickly the laughing stock of the town; instead of traveling in the usual oxen-drawn covered wagon, he is at the helm and wheel of a Contestoga-type wagon with a full set of sails. He plans to go to Oregon by taking advantage of the prairie winds. First, he wins over the town mayor, falls in love with the mayor's beautiful daughter, Molly Crum, and then secures financial backing from the townspeople. He sets sail across the plains, with Molly Crum as a covered-wagon stowaway, and a Kansas twister looming on the horizon. And, then, the wind hits the sails. And the fan, too, if he had had one.

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.

A singing entomologist (Roy Rogers) acts meek to help a juggling sheriff (George "Gabby" Hayes) solve ranch raids.

Gridley is mining silver from an old Mexican mine and bringing it into the USA thru a passage into his worthless mine. Border guard Rogers suspects Gridley and finally finds the secret entrance to the Mexican mine. He sends Lee Madison for help only to have her captured by Gridley. Trigger brings help that takes care of Gridley's men and now Roy has to rescue Madison.

Fur theives are looting the traps on the ranch where Roy is foreman and they have murdered one of Roy's friends.

To get the three needed business men to visit the Stevens mine, Roy stages a ride with the Vacaros and has them as honored guests. Seeing a chance to make a lot of money, gangster Harmon joins the ride and then has his men kidnap the three. Having filmed a fake holdup earlier, he uses the film to convince the Sheriff that Roy and the boys were the Kidnapers.