After helping rescue Natalie, a young victim of Excalibur's subversive genetic experiments, former FBI agent Elizabeth "Liz" Kerry defends the girl as Rayford's forces fight to get her back. Unhappily teamed with Kevin Rowe, member of the Sterlings and constant thorn in her side, Liz must keep her eye on the goal and work with Carbon to keep Natalie safe. But when her past interferes with the mission, she finds greater danger than she has ever faced from mortal enemies. With her fierce independence torn from her grasp, she must entrust herself to Kevin and work with him to unveil deeper secrets of Excalibur, even a plot to destroy the very fabric of society.