Autobot City: Earth is in the hands of the Quintessons - the race out to destroy the Transformers and claim their homeworld, Cybertron as their own - and Wreck-Gar and Wheele are on the run in a rapidly disintegrating shuttle. Now the second phase of their assault goes into operation - with Rodimus Prime and the Autobot fleet lured to Earth, and Soundwave and the Decepticons lured into an ambush on Cybertron. What fate awaits both groups?