An eerie silence falls over the Vietnam jungle; riddled with traps and Viet Cong snipers that appear from nowhere and vanish just as quickly. Battle ready, a group of US combat soldiers at a remote jungle camp to find that their mission is anything but routine. Underneath the jungle is a vast network of tunnels used by the Vietnamese and an entrance has been discovered. The soldiers must confront the enemy in the darkness of the underground and face unspeakable horrors. Resorting to primitive combat methods both sides fight to further the cause of a war the neither askedĀ for.