Madcap fantasy comedy. King Stupid can't stand Bargest the dog's incessant howling, so orders Goober to swap him for a nice, cute pet. Goober is tricked by the pet shop owner and brings back a vicious, wild, mythical creature called a Chupucabra. Goober tries to train the Chupucabra but it escapes and they are both in fear of being eaten alive.