The death of a hero... the return of an old foe... and the awakening of the gods! When Ratchet, Autobot chief medic, is kidnapped, a desolate Optimus Prime must find it within himself to continue the eternal battle against the Decepticons. And unbeknownst to all of them, their battles have woken Primus - creator of the Transformers. Unfortunately, Primus' scream upon waking has awoken an enemy from before time - an enemy who will not rest until all are dead - Unicron!