Poor old Blaster! Not only has he lost his friends, the Throttlebots, to the forces of RAAT (Rapid Anti-robot Assault Team), and been captured by the Protectobots, who are under orders from Grimlock to bring Blaster back to the Ark to face trial and possible execution, but he's also under threat of extermination from the fearsome Decepticon group known as the Combaticons. Deprived of their primary targets (the Throttlebots), the Combaticons want Blaster for themselves, even if it means going through the Protectobots to get at him!