When Billy and Kate to moved New York to work at the Clamp Center building, they bought this apartment to live in. When Billy found his old pet Gizmo at the Clamp building, he instructed Kate to take Gizmo to their apartment later, but Gizmo soon got wet and spawned a batch of new, sinister Mogwai that locked him in an air vent. Kate mistakes the crazy Mogwai Daffy, who was left behind by the other three, for Gizmo, and takes him back to the apartment where he breaks things, plays with his food and messes up the kitchen.