The Legion has found the one world that might have the weaponry necessary to defeat Robotica and retake Earth. Unfortunately, the only chance they have to use those weapons lies in defeating the legendary figures guarding them! Meanwhile, on Earth, Brainiac 5 matches wits with Robotica's leader, who Brainy is discovering is no slouch in the brains department either!

The Legion recruits Warworld to fight against Robotica and make plans to ultimately defeat it. They soon learn the true force behind Robotica is Computo, a former creation of Brainiac 5.