What happens when humanity's hope rests on the shoulder of a teenager? Caleb didn't come out of the zombie uprising unscathed. He's been scarred-both mentally and physically. The rest of humanity is trying to rebuild, to make the world normal again. Caleb is trying to return to a normal life also, but after all he's seen, after the loss of his family and friends, the transition is difficult. The darkness that led him down a path of self-doubt and self-harm has never left his mind. Things only become worse when he discovers he's immune to whatever makes a zombie a zombie. Fighting zombies was predictable. He knew what to expect. Fighting humans is volatile. They are malicious and treacherous. They won't stop to get what they want, and Caleb has to figure out exactly what that is. *Trigger warning: Attempted suicide