Arcee reports an attack on the planet Praum, prompting the Autobot Headmasters to investigate. When the group arrives, they learn that everyone at the base is already dead. Meanwhile, on Earth, Rodimus and Ultra Magnus are investigating a possible new energy source. The two head to a base in Asia, only to find that the occupants have been slaughtered by the Decepticons. Upon finding the energy source data, Rodimus soon learns that Cerebros' team is walking into a trap on Praum, set by Scorponok...