After Leo rescues Harper from her zombie-infested apartment building, the preppers finally meet in person at an abandoned house - which might not be as empty as it looks.
Mac takes off once he, Leo, and Harper reach West Virginia, leaving a furious Harper and an uncertain Leo to deal with a broken-down car and their own relationship troubles.
Still determined to find a way to reach his family, Mac sets out alone through the perilous West Virginian forests and encounters some of the most savage zombies yet.