Zombies have overrun the entire world, outnumbering humans 400,000 to 1. The surviving humans live in barricaded camps and secure underground bunkers. In an underground facility in the Everglades housing scientists and soldiers, the scientists are trying to find a solution to the zombie pandemic; the soldiers have been assigned to protect them. Dr. Sarah Bowman, soldier Private Miguel Salazar, radio operator Bill McDermott, and helicopter...