Quick recap
The Decepticon Overlord has seized the Garrus-9 prison, slaughtered the guards and turned it into an arena where captured Autobots fight to the death. Three years on, Ultra Magnus sends the Wreckers, led by Springer, to take it back. Their drop pods are shot down, the team is scattered, and Overlord orders the remaining Autobots executed. Inside sits the Aequitas supercomputer, which holds the Autobots' own secrets; to access it, Ironfist gives up his spark. Several Wreckers die along the way. In the end, Ironfist detonates the chips implanted in Overlord, who is left crippled and begs Impactor to kill him. Impactor refuses: Overlord will stand trial, and the survivors escape with the data.

