Starscream pursues other interests while Skyquake battles with Optimus Prime and Bumblebee.

Bumblebee questions his worthiness to his team after he is compromised.

Bumblebee discovers that MECH and Starscream are responsible for his troubles; Ratchet confronts demons from his Cybertronian past.

The Autobots face the Decepticons for a final showdown.