As war ravages Eastern Europe, a battle-hardened team of mercenaries sets off on a mission, facing an enemy powerful and evil enough to turn these violent, seemingly indestructible men into quivering victims. Surrounded by hostile forces, they fight their way to a half-century old underground Nazi bunker, a place where soldiers were experimented on to create a super-human army. The mutilated remains of those soldiers still exist along with a ghastly discovery - a survivor. Suddenly the men are attacked by a primeval, horrific force. One that is protecting another secret, a nightmare that they and the entire world will now have to face.