The Abbies attack CJ and the harvesters, leaving Teresa in grave danger and the town dangerously low on food supplies. Then, Theo constructs a makeshift triage unit, but he may not be able to repair his marriage to Rebecca. Also, Xander still has some fight left in him as Jason questions his abilities to lead.

Theo teams up with Hassler to track the escaped Abbie leader; Xander confronts Rebecca about her condition and Jason learns devastating news about Kerry.

Pilcher recalls finding his Chosen One. Then, as the Abbies close in, Jason makes a fatal judgment call and Theo and Xander must put aside their differences to stop him before the human race is lost.

As the Abbies descend upon the town, Theo is forced to make a decision that could seal humanity's fate