Deny Richter is incarcerated unjustly in the state of Texas. The rest of the inmates usually pick fights with him and even though he doesn't start fights he does end them. Every inmate that he has beaten has ended up hospitalized. The warden knows he is innocent and advices him to "never give them a reason to be right." At the same time he is making close bonds with a prison nurse named Jennifer "Jen" Marshall. A few days later an outbreak happens and a prison riot starts the warden tells Deny to get out and to take Jen with him. He tells them to head west to an old bunker that belong to him, because he isn't going to make it. On the way they fight zombies, militias and they pass through Deny's home town in Arizona to pick up his friends Doc, Jeff, Tammy and Jamal.
