Recently credited with wiping out the Neanderthals, an ancient virus is released within Yellowstone National 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? Follow along with a select group of individuals as they fight for survival. Can they avoid the infected? Can they evade the military called in to help? Can they trust each other? Will humanity survive the raging cannibals that erupt from within?