Cheese-loving eccentric Wallace and his cunning canine pal, Gromit, investigate a mystery in Nick Park's animated adventure, in which the lovable inventor and his intrepid pup run a business ridding the town of garden pests. Using only humane methods that turn their home into a halfway house for evicted vermin, the pair stumble upon a mystery involving a voracious vegetarian monster that threatens to ruin the annual veggie-growing contest.

Gromit’s concern that Wallace is becoming too dependent on his inventions proves justified, when Wallace invents a “smart” gnome that seems to develop a mind of its own. When it emerges that a vengeful figure from the past might be masterminding things, it falls to Gromit to battle sinister forces and save his master… or Wallace may never be able to invent again!