A high-school chemistry teacher learns he has cancer, so he takes up a new career as a meth producer in hopes of earning enough money to take care of his family.
The story of the years that follow after a zombie apocalypse, following a group of survivors led by a former police officer, who travel in search of a safe and secure home. As the world overrun by the dead takes its toll on the survivors, their interpersonal conflicts present a greater danger to their continuing survival than the walkers that roam the country.
A former Confederate soldier helps construct and expand the first transcontinental railroad, a task taken on after initially seeking revenge on the Union troops who killed his wife.