Rodimus leads a rag-tag group of Autobots on the starship Lost Light, in search of the legendary Knights of Cybertron. Most everyone abroad is unaware of what's hidden in the bowels of the ship: Overlord. One of a handful of the Decepticons' elite "Phase Sixers," Overlord is one of the most powerful Cybertronians in history...and definitely isn't the sort of thing you want hidden a few decks below you. So, how-and why-is he there?