Marshal Landry captures outlaw Girard and bringing him in finds a woman and two children, the only survivors of an Indian attack. Later, transferring the prisoner his brothers free him. Then a stage is robbed of a silver shipment by Girard and his brothers. Examining telegrams gets Landry a confession from Girard's girlfriend. The telegraph line has been tapped and the telegrapher is the supposedly dead husband of the woman he brough in. Now knowing Girard's location he sets out after him.

In Colombia, mining engineer Rian Mitchell discovers Carrero, the lost emerald mine of the Conquistadors, but has to contend with notorious local bandit El Moro's gang and with coffee planter Catherine Knowland's love.

Santiago, a jolly modern bandito, has just lost his partner when he happens on the isolated farm of young Manuel and Maria Lopez...

The entertainment duo Mitchell & Petrillo, en route to a USO show for troops in Guam, fall out of their plane and end up on the jungle island of Cola Cola, where the mad scientist Dr. Zabor is conducting evolutionary experiments.