Zim's class at school gets a new hamster, and Zim decides that its cuteness can be used as a form of mind control. Zim attaches a device to the hamster which causes it to grow to Godzilla-like size and develop several superpowers, such as the ability to fire a laser beam from its mouth. Unable to control it, Zim instead allows the hamster to rampage throughout the city. But when the hamster heads for Zim's base, Zim is forced to team up with Dib and use alien technology to launch the creature into deep space. This is the second time in the series that Zim inadvertently saves the human race.