17-year-old Maisie Rojas is a trusted lieutenant in the Q—a post-pandemic quarantine zone. Lennon Pierce, the son of a US presidential candidate, has been kidnapped by his father's enemies and dropped into the Q. Maisie must get him out of the zone within 48 hours. With unrest brewing both inside and outside the Q, reaching the exit is a daunting and dangerous task. But if Maisie and Lennon fail, it could mean disaster for the entire quarantine zone and its inhabitants—and could cost Lennon his life.