Five years ago, they walked across America to a destination only they knew. The sleepwalkers, as the rest of the country named them, were followed by their shepherds: friends & family who gave up everything to protect them. They finally stopped in Ouray, a small town of Colorado that would become one of the last outposts of human civilisation. Because the sleepwalking epidemic was just the first in a chain of events that led to the end of the world & the birth of a new one. The shepherds & the sleepwalkers, now awake, strive to rebuild the world that was taken from them. Among them are Benji, the scientist struggling through grief to lead; Marcy, the former police officer who just wants to protect those she loves; & Shana, the first to become a shepherd & whose bravery is sorely needed. But the people of Ouray are not the only survivors, & the world they're building is fragile.