Poachers are harassing toll road owner Jen Larrabee. They want her land because it holds valuable minerals. Autry and the Cass County Boys, mistaken for Texas Rangers, help out.

A young executive is trying to convince an airline to sponsor a travel show on television, but he's not getting anywhere. When he tells his fiancé that he may have to postpone their honeymoon, she goes off on him, and as he backs away from her he hits his head on a fire extinguisher and knocks himself out. While unconscious he dreams his own version of the show he's trying so hard to sell.

While trailing Forest Ranger Charles Carter, who is suspected of permitting lumber man Henry Mitchell to cut restricted timber, Gene fires at a dangerous mountain lion and apparently kills Carter. Actually, Bill Wright, Mitchell's associate, killed Carter because the ranger had discovered tussock moth infestation in the forest, and if the infestation was not reported, the trees would die and have to be cut, thereby profiting Mitchell and Wright. In order to compensate the best he can, Gene sells his sportsman's camp and gives the money to Carter's daughter Helen . En route to Texas, Gene discovers the infestation and is assigned by the Forest Department to supervise the program of spraying the area with DDT from the air. After the first day of spraying, the DDT is blamed by furious stock men for the many animals found dead of poisoning.