It has been 10 years since the war of the Mini-Cons and the apparent destruction of Unicron and Galvatron, and the Autobots and Decepticons, working together, have entered into a secret alliance with humankind, building vast Cybertron Cities on Earth and in the solar system to mine for energon, the energy-rich mineral that Transformers need to survive. But ten years is a long time... and in the darkness of space, evil is beginning to rise again...