Sandy Doyle, gambler and political chief of a small border town, seeks to gain control of the Bar-X Ranch, owned by Rufe Rickson, to further some undercover activities of his own. He counts on Rickson's inability to stay away from gambling as the means to his ultimate success. Government investigator Oliver Shea and his assistant, Dan Haggerty, start a fight in Doyle's place when they see Rickson being cheated and are invited to the Bar-X where Oliver and Helen Rickson, Rufe's daughter, discover interest in each other and Dan finds himself pursued by Bell, the ranch cook. Sheriff Larson brings the prize money for the $5,000 race of the Rodeo Association, and that night it is stolen.

The Hawk has broken out of prison and the Sheriff and Sorrenson have a plan to have Whitlock pose as the Hawk, infiltrate the gang, and recover the stolen bonds. All goes well until The Chief who knows the real Hawk arrives.

Two Boy Scouts win an around-the-world trip with a crack aviator, and find themselves crash-landed in the South American jungles after the ace forgets to refuel in Ecuador.

A young woman visiting in Mexico is kidnapped by a gang of bandits, who drag her through the rugged wilderness to their hideout. She manages to leave word for her friend Bill, who knows the country well. But when Bill cannot find a horse, his only available form of transportation is his roadster. Nevertheless, he is determined to come to her rescue, even though it means trying to drive the car across miles of rocky, broken terrain.

A serial in 12 chapters. Tarzan goes to Guatemala to find his lost friend, D'Arnot. On the way he helps Major Matling search Mayan ruins for hidden jewels and an idol containing the formula for a powerful explosive. D'Arnot and the idol are rescued, but the idol falls into the clutches of the explorer Raglan.

Jim Gray is looking for the gang leader known as the General. When Neil Denham is murdered, Jim assumes his identity. He and his pal Squint Saunders then try to join the gang. But they get captured and Jim is told he can join up only if he kills his friend.