The arrival of gunrunners in the jungle can mean only one thing for Tarzan: trouble, and plenty of it! Armed with rifles acquired in exchange for gems, the warlike Yorongan people overwhelm the proud, peaceful Ashuba tribe and its beloved queen (Dorothy Dandridge). The loin-clothed Lord of the Apes plunges into action to restore order in an adventure that has him swooping from tree to tree; plunging over a waterfall; confronting a giant, flesh-eating plant; liberating captives and taking on the Yorongan king in a knife-edged death match. Lex Barker portrays the legendary Ape-Man (the star's third of five vine-swinging roles) in this matinee rouser that, rare for the series, includes scenes shot on location in Africa.