No one dares to leave the District - the towering structure of glass and steel that is their protection against the unruly bands of Outsiders that roam Mundreel and the deadly rain that carries the disease that kills all over the age of 19. This skyscraper stands amid the urban devastation, the city rumored to have once been called "Montreal". Esther and her allies have created a haven on the rooftop, a garden that flourishes, and a home for her new baby, hidden from all but the very few who know her secret.
The source has been destroyed. Food is scarce. Tensions are rising. Then the earthquake strikes. Esther and Caleb hit the road, leading a ragtag caravan. Their destination? A mythical city where they hope to find food and shelter - not to mention a way to make it past age 19. On the way, alliances and romances blossom and fracture as the group faces vicious gangs, violent weather, and more variants. Esther must rally to take charge, accepting the help of a blind wilderness guide, Aras.