With the Decepticons still hiding on Planet Master, the Autobots are divided about whether to confront them on the planet or drive them into space to battle there. Determined to end the fight on Master, Chromedome leads his fellow Headmasters to an outpost where the defenders of Planet Master, under the leadership of a Transformer named Kirk, are preparing for a final strike against the Decepticons. Spotting the Autobot Targetmasters approaching their cavern, the Decepticons attack to drive them off, and spot a Master surveillance plane during the fighting...