Optimus Prime, Bluestreak, Ironhide, Huffer and Mirage, the five Autobots who will stand against the imminent Decepticon assault on the Ark. The odds don't look good for the Autobots, but Optimus Prime and Co. are unaware of Sparkplug Witwicky's little extra 'contribution' to the Decepticon's fuel supply, which could turn the tide of the battle into their favour...