Optimus Prime has been troubled by dreams of his old friend Elita 1, who went M.I.A during the Great War. Megatron returns to Cybertron seeking Ancient Relics from the Knights of Primus, In the Caste Megatron discovers a mildly insane Decepticon who has been trapped there for mega cycles. Returning to earth with a new allie and a weapon of mass destruction, Megatron is determiend to destroy Optimus once and for all