Thirteen months after the events in the first book of the series, Randall Morgan and his family still live a life of uncertainty. A life in which they-like the other scattered groups of survivors-must be constantly on guard. One day, however, they make a macabre discovery that leads them to believe that their pursuers will not pose a threat much longer. But can they trust that it's not just another clever trap set by their invisible enemy? And can they trust each other?