While Madison struggles to keep Nick from 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.

As civil unrest grows, and the dead take over, Travis and Madison try to devise ways to protect their families.