Meeper, the janitor of an alien pub called the Ale-E-Inn, has higher aspirations—a karaoke performer. After he accidentally electrocutes a singer, he is ejected from the pub. Outside, he is told by an incautious Gungan that "The ChubbChubbs are coming!" Meeper sees aircraft land in the distance, and huge, weapon-bearing monsters exit the craft. He assumes these are the ChubbChubbs.
Meeper and the ChubbChubbs want a home for Christmas, but when they land on earth, they fall on and injure Santa. The sake of the holiday is in Meeper's hands. Meanwhile, a mean little boy named Brad hacks the www.IveBeenGood.com website and puts him on Santa's nice list when he finds out he is naughty. This causes Meeper to think that he was good. When Meeper gets to the house, one of the ChubbChubbs is taken by Brad. Puzzled, Brad tries to find the opening for batteries when he puts it in the wrong place. Meeper finds out and picks up the biggest ChubbChubb. The creatures finally get their wish....a trailer, but the ChubbChubbs eat the house, causing them to go back home.