After the worst pandemic in mankind's history, anarchy threatens to break apart the United States. The government is years away from providing even the most basic necessities. Militias, gangs of convicts, and rogue soldiers face off in a violent free-for-all as they vie for power. Few safe havens remain. Big cities have been overrun with deformed survivors of the Superpox-99 pandemic. Smaller towns are being overtaken by authoritarians and lawless thugs. And congested interstates have become thoroughfares for desperate travelers and bandits seeking to capture women and supplies. Duty drives Deputy Marshal Mason Raines to leave the small town of Boone to discover the fate of his fellow lawmen. With his faithful wolfhound, Bowie, at his side, he crosses paths with desperate refugees, a bloodthirsty hangman, and savage cannibals. Only as he discovers the horrific truth, does he realize that he may be the last of his kind.