Officer John Brown is after the outlaw known as the Night Rider. Posing as Jim Blake he takes a job on the Rogers ranch. He finds the secret passage from the Rogers mine to the Rogers house used by the Night Rider and also a note written by the Night Rider to his henchmen. Practicing his hand writing, he has a plan to trap him.

Dave Kent, a commercial aviator, and his mechanic, Skeets Smith, are forced to make an emergency landing in Mexico and find themselves in the hands of La Panthera, a notorious bandit who wishes to overthrow the government and become president of a new republic. Manuel, his chief henchman, obliges them to collect the booty in a robbery, but Kent manages to meet María Valdez, a prisoner--held for marriage to the insurgent leader--who implores his aid. Kent and Skeets are arrested for the robbery and sentenced to death.

At a hotel in the middle of the Sahara, an old man and his daughter try to keep the location of a hidden treasure from a collection of thieves and criminals staying at the hotel who are determined to get it. A suave gentleman thief arrives at the hotel one day with his own plan to get the loot, but complications ensue when he begins to fall for the daughter.

After rancher Harvey Comstock is killed by a rustler in a ploy to buy his ranch cheap, oil is discovered on the ranch.