Adventurer Clint travels across Borneo with a bunch of rogues and geologists on the search for a diamond mine. In the middle of the jungle, they meet a beautiful woman called Samoa. Hardly a surprise that Clint falls in love with Samoa, but trouble with the natives begins when the diamonds are found because diamonds are holy stones to them.

Maciste and his people flee their volcano-ravaged island. They end up caught in between two warring tribes.