Orion Pax - the former Optimus Prime - follows a rogue group of
Decepticons into one of the greatest mysteries ever to face the Autobots! The
mysterious Metrotitan arrives on Cybertron - smashing into the ruins of
the legendary Crystal City! And, tensions ratchet up between the Autobots and
Decepticons as violence breaks out in the heart of the city... and Prowl looks
for someone to blame. Is Dirge a convenient target - or the key to what
comes next?
