Once again, Tucker Pierce and friends must fight for their lives against the better-equipped SYLO, and they will risk nearly everything to keep each other safe as the battle's climax nears.

While on the run from the SYLO team, Tucker, Tori and Kent are driven directly into another base of the invaders. They become prisoners, destined be conditioned to forget their old lives and turn on one another to survive. Drawn to a mysterious dome unguarded in the midst of the base, what they discover will change everything they know about the war, their world, and themselves.