On Earth, the Autobots are left to pick up the pieces of their lives following Galvatron's visit to our time, unaware of the sinister presence that is still watching them from the year 2006. For them the battle is over, and for many of their number it may even be over permanently! For the Autobots on Cybertron the battle is just beginning. Operation: Volcano - the trap designed by Impactor and Emirate Xaaron to rid themselves of ten of the Decepticons' deadliest killers - is ready to begin. If it is successful, the signal will have been given for Autobots all over Cybertron to rise up and fight back against the Decepticon conquerors who enslaved their homeworld. But with Ultra Magnus on Earth, and a rogue element in the shape of a psychopathic Decepticon, Operation: Volcano seems destined to end in failure...and tragedy!