Tarzan's cousin arrives in Africa seeking his help to secure a fortune in diamonds crucial to England's military security. However, the cousin is brutally murdered by his guide Rokov, who then convinces Edwards to disguise himself as the cousin. Meanwhile, a young boy named Joey, who was being used as crocodile bait by natives, is rescued by Tarzan.

Tarzan's Savage Fury
Two undercover British agents, posing as dignitaries, embark on a mission to retrieve a valuable diamond cache for the English military, as their true intentions remain obscure. They form an unexpected partnership with Tarzan, who agrees to guide them through the treacherous African wilderness.