After a bloody battle with mutant Zapheads, Rachel Wheeler’s life hangs in the balance as the world falls apart around her. To save Rachel, a small group of survivors must find a missing baby, a hyperintelligent Zaphead with mysterious healing powers. The remaining Zapheads have reverted to mindless, violent savages who want to wipe out the human race. Only Rachel holds the key to understanding them and ending the devastating war. Even if they succeed, a rogue military leader is imposing his fascist vision of the future. But Rachel and her friends are determined to defend their freedom and humanity at any cost.