Josephina Silva is the sole child born within the walls of Walltown who has evaded the clutches of the enforcers at birth. Raised entirely within the confines of Walltown, she has never experienced life beyond its boundaries. As she reaches her twentieth year, Josephina stumbles upon the unsettling truth behind the systematic abduction of newborns and the sinister motives driving the imprisonment of her people within the wall. Now thrust into a burgeoning rebellion, she takes the role of monitoring the actions of the zone's leader. Kaysen Stark emerges as the newly appointed leader of the eastern zone. Upon his arrival, he becomes acutely aware of the covert movements within the town, and finds himself under the vigilant gaze of a young woman observing him from the shadows.