The survivors of the apocalypse, known as the Mud Island Family, embark on a journey across the United States in search of a network of supply silos left behind by the Air Force. What begins as a simple mission, becomes an adventure of discovery when they locate yet another super-shelter built by the Titus Rush Survival group. They are forced to place their lives in danger repeatedly as they encounter survivors who have either turned to each other for help or resorted to evil at the expense of others. Their journey takes them to the vast missile fields of Wyoming, where the United States Air Force has left behind more than what they expected to find. The Chief, Kathy, Cassandra, and Captain Miller make friends and enemies as they confront new horrors in the world of the infected dead.