The Decepticons having been driven from Earth by the Autobots under Ginrai, the Autobots and others form the Galactic Peace Alliance to counter them and other threats to the safety of the universe. The leader of this organization is the new Autobot Supreme Commander, Star Saber, who takes over as commander of the Autobot force protecting Earth. As Ginrai leaves shortly before Star Saber is due to arrive, Earth's Lunar Station is attacked by the Dinoforce, Decepticons loyal to the new Emperor of Destruction Desaras...