While Dr. Porter and Miles venture into Willoughby in search of allies within the town, Monroe seizes an opportunity to surprise the Patriots. Neville’s political maneuverings put him and Jason in serious danger, as Aaron and Priscilla continue on their journey.

Truman, empowered with new authority from the President, launches a mustard gas attack designed to kill Miles and Monroe. To Rachel's disappointment, Miles agrees to join Monroe in a ruthless plot to beat the Patriots at their own game. As Neville faces his own challenge from the Patriots, Aaron grows increasingly alarmed by the power of the nanotech.

United by their desire to take the Patriots down, Neville and Monroe form an uneasy alliance. As Rachel comes face-to-face with the nano-tech while searching for Aaron, things don't go according to plan for Miles, Charlie and Gene when they try to steal the Patriots' supply of mustard gas.

Miles, Charlie and Monroe launch an attack on the Patriots, but must improvise a risky new plan in order to halt the oncoming war between California and Texas. Out for revenge, Neville sets his sights on President Davis. Meanwhile, Aaron and Rachel’s efforts to save Priscilla from the nano-tech has unexpected consequences.