Professor Anton Edwards while heading a little scientific expedition in to French Equatorial Africa comes in to possession of a mummified head that talks. He believes it to speak the language of the lost people of Atlantis and will guide them to where a remnant of that race may be found. With the professor are his daughter Lorna, his assistant Jack Martin and Umguru a huge native prince.

Lorna was found wandering in a trance and in effecting her rescue a sacred snake was killed. The snake worshippers gathered to avenge the killing of one of their Gods but the party hastily broke camp and marched. Now believing that they have thrown off pursuit they decide to camp again.