⁣A young karate expert searches for her brother's killer in Hong Kong.

⁣At his remote laboratory in Zarpa Mesa in Mexico, a mad scientist seeks to create a master race of superwomen by injecting his subjects with spider venom!

⁣Hoping to buy land in the Mexican state of Texas, Jim Bowie visits Nacogdoches where he's arrested as a spy, flogged, and sentenced to death.

⁣Cisco is convinced by a beautiful woman that her brother, who escaped from prison, is trying to prove he was framed for a murder did not commit.

⁣John Wayne sings! Well, not really. His voice was dubbed here, but as Singin’ Sandy Saunders he’s still able to write the code of justice with a blazing six­gun! He’s a government agent out to help a group of ranchers in their battle with a villain who is tying up local water rights. Also starring Gabby Hayes, Al St. John, Yakima Canutt, and Cecilia Parker, Riders of Destiny was filmed early in Wayne’s career – it was his first for Lone Star ­ but the unmistakable swagger is already in place!

⁣Kalmus is after the freight contract held by Summers. When his gang kill Summers, Tex and Duke step in to help Madge keep the freight line going. When they foil the gang's further attempts, Kalmus gets the Judge to jail the two.