In a world where the young fight for survival against the savage monsters they are destined to become, Scout's mission all along has been finding a way to stop everyone she loves from going Gray. With help from her friends, they discover the life-saving cure just as Grays overrun their sanctuary. Once again on the run, Scout and her companions stumble across the Hill, the last bastion of hope in this devastated world. But when an army of Grays led by an old adversary breaches the Hill's defenses, their illusion of paradise is once again shattered. In this final, desperate fight against overwhelming odds, the fate of humanity teeters on the brink. If Scout and her friends fail and the cure is lost, mankind is doomed. Don't miss the thrilling conclusion to the series!