A year after assuming leadership of the Autobots, Rodimus Prime hosts an intergalactic sporting event, which falls victim to an attack, resulting in the abduction of Spike Witwicky, Kup, and Ultra Magnus. Rodimus is quick to blame the Decepticons, who are divided and weakened by the loss of their leader, Galvatron. But Galvatron's fellow reformatted Decepticons, Scourge and Cyclonus, may have found a way to restore their leader to power. The real culprit may be a new face, but one with a link to the histories of both Autobot and Decepticon, manipulating both sides to take their own revenge.