Affter a harrowing escape from an alternate CYBERTRON on the brink of being consumed by a dark force of monumental power, OPTIMUS PRIME prepares for an apocalyptic battle in his reality. An advance guard of heralds has been defeated before they could complete their mission to destabilize the power bases on CYBERTRON and Earth, but thanks to OVER-RUN, who survived a previous attack by the dark force, PRIME knows that what he really needs is the MINI-CONS. All of them...