A crusading newspaper editor recruits his old friend Hoppy to take the job of marshal in a town rife with vice and murder directed at helpless miners.

Hoppy and Lucky are headed to South America to deliver a herd of cattle. Bad guy Ralph Merritt gets in their way. For a while.

Hoppy's brother has been murdered and he is on the trail of the murderers. To get them he makes himself seem to be a wanted man.

Hoppy, Johnny and Windy are fighting a malicious gang trying to stop a cattle drive from reaching a drought-stricken North.

An evil deputy is using Indian half-breeds to rustle cattle. This causes trouble between the cattlemen and Indians. Hoppy, Windy and Lucky see that justice is served. Songs abound.

After the death of one of their fellow pilots, a squadron of Navy airmen plots to keep his newborn son away from their superiors, who have decreed that the baby should be given up for adoption.