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.

When 9 first comes to life, he finds himself in a post-apocalyptic world. All humans are gone, and it is only by chance that he discovers a small community of others like him taking refuge from fearsome machines that roam the earth intent on their extinction. Despite being the neophyte of the group, 9 convinces the others that hiding will do them no good.