Heasters starts with Galvatron leading a new batch of Destrons to wage war on Cybertron, the Destron Heasters. The Cybertrons are rescued by the arrival of the Cybertron Heasters, led by Fortress (Cerebros, the head of Fortress Maximus). It is revealed that Fortress Maximus left Cybertron millions of years ago in search of energy, and have finally managed to come home. He explains that the Heasters are from a planet called Master; the human-sized robots who live there built themselves Transformers-sized bodies. They can then transform themselves into the heads of the robots, and have now ed the Cybertron-Destron war.