A highly dysfunctional blended family is forced together when they realize a reported virus is actually the onset of the undead apocalypse.

While Madison struggles to keep Nick from a crippling withdrawal, Travis ventures out to find his son before the city of Los Angeles falls.

After they escape a riot, Travis, Liza and Chris seek refuge with the Salazars; Madison defends her home.

Madison and Travis see different sides of the National Guard's occupation in their neighborhood; the family tries to adapt to the new world.

The National Guard's plan for the neighborhood is revealed; Travis and Madison make a difficult decision.

With information Daniel retrieved from the guard he tortured, the three families attempt a dangerous rescue to free Nick and Liza so they can all leave town to find safety.