Roll out with Optimus Prime, Bumblebee and the rest of the heroic Autobots as they battle the evil Decepticons. Megatron's body is out of action, but his mind has taken over Bumblebee. Can the other Bots stop the Decepticon leader, before they lose their friend for good? Meanwhile, Starscream wants to use Dark Energon to give him extra power, and to re-awaken Skyquake...