The adventures of Wallace and Gromit, an inventor and his dog. When Wallace creates a pair of walking techno-trousers for Gromit, things turn topsy-turvy as their fishy penguin roommate hijackes the pants and the sleeping Wallace for an off-the-wall diamond caper. It's up to Gromit to prove that he wears the pants in the family, stop the penguin from hatching the sinister plan, and rescue Wallace form a fate worse than running out of cheese.