Time is running out. While thousands of teens languish in the camps, Ruby and a group that survived the latest round of attacks gather in the North to plan a rescue mission. They only have one weapon and it’s a double-edge sword: proof that the government was behind the plague that killed so many kids. Tensions build when rumors of a possible cure start circulating. Ruby knows the future of her entire generation hangs by a thread and it will only take one false move to make the string break.