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!