She lost everything because of the virus. Now she stands to lose even more. It's been two months since Sadie O'Dell and her friends discovered the existence of the Wall and took over the Eden Facility, and two months since she and Kimberly Gellar followed Ethan Bennett south to track down and evacuate survivors, and Sadie has finally begun to find some measure of happiness and family after the loss of her brother. But her little family's routine is shattered after they rescue a lone survivor outside of the Demopolis community in Alabama. A fellow survivor and acquaintance from Sadie's past, Dez Ikeda, reveals a potentially devastating discovery he's made, one that the leadership of the community is trying to keep under wraps. Ethan starts experiencing new, alarming side effects from his infection, ones that could upend everything they thought they knew about the virus. And an attack on Demopolis reveals an unexpected threat closing in on them, one determined to accomplish its goals by any means necessary. Contains mature themes.