When Professor Stanley Manning and Professor Brandon Horne undertake a routine 'dig' in Brazil in 1949 while working for the University of Stanton in West Virginia as archeologists, they are startled when they find a strange ancient pyramid that does not fit the traditional description. Instead, they discover a primeval device inside the pyramid that appears to be an advanced computer. When they attempt to move the equipment to a safe place, deadly creatures that look like gargoyles and ancient stranger creatures that resemble shadow men attack them with lethal force. As a dangerous thunderstorm inundates the jungle, they escape only to find themselves alone and at the mercy of the jungle. Encountering rebel gargoyles that are at war with the ancient voracious shadow people, they escape after hiding the computer. As they make their way back to the US, they realize they are targets of the shadow people and the gargoyles. They want the computer and the pyramid back. They will do anything to get it. Manning and Horne face incredible danger as they attempt to recover the electronic equipment they left in Brazil. The brutal gargoyles and the hellish shadow people constantly attack them and surviving the ordeal becomes their main objective, one they cannot afford to lose.