At the onset of a zombie apocalypse, chaos descends as Rose loses her family, Ryan tries to get his bearings, and a desperate man finds a new guise.

William, Sun and Barbara try to drive to the stadium, but it's tougher than they thought: They're blocked by both living marauders and roving undead.

Forced to fend for themselves, the survivors that were left behind must improvise and look out for both the dead and the living.

Trapped in an abandoned diner, William and Sun must decide whether they can depend on the survivors from the truck as their alliance is tested.