The ''cons get the key back, and return to Cybertron. Galvatron has a giant engine built on Cybertron to move it close to Earth''s sun. He then uses Cybertron''s plasma chamber to attempt to drive……
The ''bots rescue their friends. The ''cons meet up with the evil Nebulons, who mimic the Autobot''s Headmaster idea: the five monster ''cons become Headmasters. Cyclonus and the other four ''cons……