The Autobots & Decepticons battle for control of their home planet Cybertron. Meanwhile, a signal reaches them from a lost race of Transformers, revealing the existence of the Mini-Con robots on planet Earth! Having awakened from centuries of hibernation, the Autobots and Decepticons follow the signal, each one hoping to be the first to find them. Whoever partners with the Mini-cons, gains powerful new abilities! The fate of the Earth and the Universe depends on who controls these small 'bots!...