Afin de pouvoir payer toutes ses factures, Wallace décide de louer une des chambres de sa maison. Le nouveau locataire, un étrange pingouin, va rapidement troubler la vie de Wallace, l'inventeur, et de son fidèle chien, Gromit.
Plasticine animation of Wallace and Gromit, inventors of all manner of useful devices. Gromit (a dog) finds himself being pushed out of his room and home by a new lodger who is actually a ruthless criminal (and a small penguin). The penguin is planning a robbery and needs to use Wallace and his mechanical remote controlled trousers to pull off the raid. However, Gromit is wise to the penguin and comes to the rescue.