The benevolent Maximals, led by Optimus Primal, and the evil Predacons, led by Megatron, continue to wage a massive battle for the gleaming, energon-rich planet Cybertron. The Predacons now have unbeatable new weaponry at their disposal, including a viral mine that robs Optimus Primal of his personality, and renders him helpless. But now Megatron faces a new enemy, Terrorsaur. When a fight breaks out between them, the Predacon base is destroyed, victory appears to be at hand for the Maximals. Or is it? Could Megatron and Terrorsaur be setting a trap?