Optimus Prime has given up his title and is now Orion Pax, and he is on the trail of the deadliest Decepticon of all...Shockwave! The Decepticon Justice Division gets a turn as well, hunting those who disobeyed Megatron. And the Dinobots are back, headed by Ironhide into the Cybertronian wilderness searching for lost Autobots...but what they find might be the greatest danger of all!