Although the war on Earth has ended, the war between Transformers has not yet concluded. Red Spider flies back to Cybertron, planning to return to Earth with an army for a final decisive battle. The Autobots discover that Megatron's body is missing; it turns out to have been stolen by Shockwave. Subsequently, Megatron is revived and is determined to begin his revenge. Meanwhile, Red Spider is also leading reinforcements from Cybertron, and at this time, the Autobots have enhanced their own combat capabilities. A great battle is inevitable...