The armaments production programme is being sabotaged by a gang of Germans. A few arrests are made but the destruction of a vital plant goes on. Test pilot 'Bulldog' Bill Watson plunges headlong into the mystery.
Hoppy and Lucky have been called in to investigate a series of stage holdups. The robbers are taking gold from Colby's mine and Hoppy suspects it may be ex-outlaw Colby himself.
This movie's preamble explains the importance of salesmanship after the great depression The industrial revolution has created a life of modern convenience for America, and there are more products available than most people can fathom.
In 1830 Pierre Courier, a rich and elderly shipowner, awaits the return of his son Stefano, who has just returned from a long trip to Trinidad in the ship in which he is captain.
Protecting himself in an attack by rustlers, Rancher Steve Holden believes he has killed one of the attackers, young Bud Mathews, who in reality has warned Holden of the rustlers' approach.