Now on the run from Sentinel Prime and the rest of the power-hungry Constructicons, Pax and D search for allies and answers in the ruins of Cybertron. They must find out what Pax's mentor sacrificed his life to protect and why the Constructicons will do anything to stop them. Side by side, Pax and D face one seemingly insurmountable challenge after another, as they unravel the secrets of the past and -- ultimately -- the future of Cybertron.