Wallace and Gromit's new lodger, a mysterious penguin, takes an interest in one of Wallace's inventions: a pair of remote-controlled techno-trousers.
But when faithful dog Gromit gets wise to the penguin's villainous intentions, he sets out to stop him from embarking on a crime spree – but before he knows it, the mild-mannered Wallace finds himself an unwitting accomplice to a daring diamond robbery.
