Escaped criminal "The Fox" hates Hoppy and a Rurales colonel for imprisoning him and lures Cassidy to Mexico in order to exact his vengeance.

The Cisco Kid is captured while keeping a rendezvous with cantina dancer Dolores but is released by his captor, the commander of a U.S. Army regiment, to help break up a kidnap ring. On his way to Las Tables with his pal, Gordito, he makes a stop at the Martinez Rancho, where they learn that his friend Carlos has been kidnapped, from his wife Marquerita. At the Crystal Palace Saloon, Cisco runs into an old girlfriend, Sally, who he once jilted for a tight-rope walker, but she doesn't betray him when the sheriff and an army officer enter searching for Cisco.

Hoppy's friend Dennis owns a rich gold mine. Frazier who owns the adjoining mine and wants the Dennis mine, has Dennis killed. Hoppy steps in to take over running the Dennis mine and learns Frazier's men sneak into and work the Dennis mine at night. Hoppy captures one of Frazier's men only to be captured in return by Frazier and left to die in a burning building.

A pilot carrying a valuable amulet is shot down over China by a ruthless Russian agent, who also wants the amulet.

Sayres and his outlaw gang operate out of a town just across the border and out of the jurisdiction of the Texas Rangers. Ranger Bob Allen is sent across the border where he poses as an outlaw hoping to lure the gang back into Texas. He gets into Sayres' gang displacing the gang boss but the disgruntled ex-boss is able to expose the hoax and Bob is made a prisoner.

Two daredevil pilots go after the same girl.