For years, the biggest threat that Yellowstone was thought to offer was in the form of its semi-dormant super volcano. Little did anyone realize the threat was real and slowly working its way to the surface, but not in the form of magma. Lying deep within the bowels of the earth itself, an ancient virus waited. Recently credited with wiping out the Neanderthals, the virus is released within the park and quickly spreads. A desperate plea for assistance reaches the military, but are they coming to help those battling for their lives or to wipe out every living thing in an effort to prevent a second mass extinction? Can humanity survive the raging cannibals that erupt from within?