Tinker Air Force Base has fallen to the infected. Rachel's plane to Seattle has been shot down over a mountain wilderness in Idaho. Is she alive? It is up to John, Katie and Dog to race against time, invading armies, blizzards, herds of infected and vicious wild predators to reach the crash site. As they fight their way across the country, they must come to grips with the new reality of the world, and devise a long term plan for their survival. Sweeping...