Set in the distant future when the Earth is no longer inhabitable and the Megacorporations have banded together to control the remaining planets and their moons. When an alien force of undead Necromutants known as the Dark Legion prepares to attack the inhabited Mars, the Megacorporations assemble a band of warriors to destroy the warlord Alakhai. Together they return to Earth, infiltrate Alakhai’s gothic Citadel, and attempt to reduce it to rubble.

The Autobots believing that peace was possible finds out that Megatron’s dead body has been stolen from the US Military by Skorpinox and revives him using his own spark. Now Megatron is back seeking revenge and with Starscream and more Decepticon reinforcements on the way, the Autobots with reinforcements of their own, may have more to deal with then meets the eye.