When a deadly virus decimates most of Earth's population, 16-year-old Sawyer Bradshaw finds he is both immune and alone in a world that has descended into violent chaos. Armed with only his estranged father's shotgun, and an unrelenting desire to stay alive, Sawyer discovers that he not only has an uncanny knack for cheating death, but also for taking lives. It's not long before he meets his match in a fierce and cunning teenage girl named Sara. By her side, Sawyer emerges as more than just a natural-born killer but as a leader among men. Nevertheless, as quick as the young survivors fall desperately in love, they find themselves caught up in a series of conspiracies and twisted struggles for power. They soon realize that love, betrayal, and death tend to walk hand in hand.