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.

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.

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.