Aria has lived her whole life in the protected dome of Reverie. Her entire world confined to its protected space, she's never thought to dream of what lay beyond its doors. Perry and his tribe have always struggled to survive on the outside. Though their lives are simple they are increasingly under threat from an unknown - and unhuman - enemy. But when Perry saves Aria after one of these attacks she realizes that she might just be able to survive in the outside after all. And that this one sheltered girl might be the only one that can save ? or destroy ? his people.