Putting together one timeline to solve her own, Wren s bloody struggle in the present intersects the terrible history of the ever-shifting social experiment she s trapped inside. Wren is their missing piece. A prophecy come true. The last person to escape, and the first to enter Blink in eighteen years. And as such, she has come to represent the proper end for both sides. As she fights to stay alive, Wren is recruited by the remaining resistance to take back Blink, setting her on a collision course with the man on the top floor. The one who knows everything. The one they call god.