Lauren Olamina is part of the generation of children who do not remember the world before. Before the water shortages, and the walled communities, and the drug addicts who burn anything and everything just to watch the flames. Before the California-Oregon border was closed, and Alaska began to talk about seceding. Lauren believes the Earth is dying, and that sooner or later, humanity will have to take to the stars in order to survive. And Lauren means to survive. But how can she convince those around her that they must be ready, that the good times her father and step-mother talk about are never coming back? As the world outside the wall continues to crumble, Lauren hones the philosophy she believes to be humanity’s only hope, becoming the lonely prophet of a new religion born from the ashes of American civilization.