Jack Lupton loves three things in the world, Buck his dog, Scout his horse and the lovely rancher's daughter Mary Gale. But his beloved horse Scout was driven off by man's cruelty and finding freedom, now leads a big herd of horses to run wild! And Jack has his own problems with the cruelty of his fellow man, in the form of James Hill his brutal and jealous rival for Mary's affections!

Chasing jewel thieves, Captain Carson and Magpie head for the border where Carson, posing as a Chinaman, opens a store that buys jewelry. To flush the thieves into the open, Carson wins all their money at poker. They agree to sell him the jewels but plan to kill him and keep both the jewels and the money.