Deep in the jungles of Peru, the race of the century is underway.

A race to locate a legendary Incan idol - an idol carved out of a strange kind of stone. A stone which in the late 20th century could be used as the basis for a terrifying new weapon.

The US Army wants that idol - at any cost - but they are not alone...

The only due to the idol's final resting place lies in a 400-year-old manuscript. Enter Professor William Race, a mild-mannered young linguist, who is unwillingly recruited to translate the manuscript and lead the Army team to the idol.

And so begins the mission. A mission that will lead Race and his companions to a mysterious stone temple hidden in the foothills of the Andes. A temple seething with menace and danger.

But it is only when the temple is opened that Race and his team discover that they have broken a golden rule...

Some doors are meant to remain unopened.