Coop begins a bad day by accidentally creating a giant cheese monster and has to stop it, but the method he uses gets cheese in Megas's CPU core. Unaware of this, Coop enters Megas in an auto show, and is putting up a very good showing until Megas breaks down and nearly destroys the building. Fortunately, he's able to stop it, but now the Glorft see an opening to attack and invade the city, hoping to capture Megas. But first they need to find the CPU core.
