The Autobots are no more. Of their number, only Ratchet remains operational as he wasn’t at the Ark for the final confrontation with the Decepticons. But the Decepticons also suffered massive losses as a result of the ingenuity of Sparkplug. The Decepticon, Shockwave is now leading the Decepticons, and meeting with more success… all of which angers Megatron. Weak, he now lies surrounded by machinery to repair his damage and restore his fuel, and filled with a desire to destroy Shockwave and retake his leadership of the Decepticons. But when an unsuspecting Buster sneaks into the Ark, and sees the remains of the defeated Autobots, he sees that the body of Optimus Prime is not among them. Where is the Autobot leader?