In the frozen tundra of Greenland, a group of modern-day climatologists and archaeologists stumble on a shocking find: a medieval ship buried a half mile below the ice. The ship's hold contains a collection of even older artifacts - tools of war - dating back to the Bronze Age. When word spreads of the cache of miraculous weapons - tensions explode in this volatile region. Whoever possesses them can use their awesome power to control the future of humanity. Now, Sigma Force must go where humans fear to tread. To prevent a tyrant from igniting a global war, they must cross the very gates of Hell.