Deep in the jungles of Peru, the race of the century is underway to locate a legendary Incan idol that was carved out of a strange stone which in the late 20th century could be used as the basis for a terrifying new weapon. The only clue to the idol's final resting place lies in a 400-year old manuscript, and a brilliant young linguist is unwittingly recruited to translate the manuscript and to lead the US Army to a mysterious temple where the idol is hidden. But it is only when they open the temple doors when they discover they have broken a golden rule—some doors are meant to be unopened...