The Rajah of Punjab wants to come into possession of a famous gem known as "Mountain of Light". He asks adventurer Allan Foster to steal it for him, but Foster has other plans.

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.

A heroic expedition braves snow-whipped precipices and discovers the dreaded humanoids. But wait – these are extraterrestrial yetis who zipped in from outer space to conquer Earth by melting the polar ice caps with high-energy proton fields. Will mankind be global-warmed into surrender?