In the sequel to Girl Behind Glass, Willow Stanton struggles with life on the outside. Away from the shelter and safety of the Protected Area, she and her companions must hide from the Guardians who hunt them. When Bracken comes back into her life, Willow is left unsure whether she can trust him. But when finding her father becomes a problem only Bracken can solve, she has no choice but to rely on the boy who betrayed her. Once they find a hiding place at the Rebel base camp, Willow and her friends must risk everything to rescue her father, and join the Rebel cause. But the more Willow learns, the less certain she becomes of whose side she wants to be on.