In the Arizona Territory during the 1870s, Marshal Frank Wilcox teams up with a Buffalo Soldier from the U.S. Army to rally a band of survivors against an onslaught of the undead, who crave human flesh. As chaos reigns and the unimaginable becomes reality, they are joined by an Apache Chief and a captured outlaw. Together, they must navigate this new world where the dead roam, learning to endure and fight for survival.