Facing defeat on GoBotron, renegade GoBots Cy-Kill and his cronies Crasher and Cop-Tur, steal an experimental GoBot weapon called Astro-Beam. They plan to conquer Earth and use it as a staging ground in their war for GoBotron.

The Guardians contend with the monster Zod when the Renegades attack the Arctic island of Stolbovoy to obtain the energy source sorium.

Cy-Kill attacks the US military and uses the sorium to power a device that seizes control of the minds of every human on Earth.

With the world against them and Leader-1 captured by the Renegades, Turbo and Scooter go on the run.

The reunited Guardians must break Cy-Kill's hold over Earth in order to save GoBotron from a mass-produced fleet of Zods.