It's 'veggie-mania' in Wallace and Gromit's neighborhood. The two enterprising friends are cashing in with their humane pest-control outfit, "Anti-Pesto." With only days to go before the annual Giant Vegetable Competition they find that their business is booming. They come to find out that running a "humane" pest control outfit can have its drawbacks. Suddenly, a large and mysterious veg-ravaging "beast" begins attacking the town's sacred vegetable...

When Wallace and Gromit visit the space station R.A.D.I.S.H., which grows giant vegetables to feed the Earth, they soon uncover a plot to destroy the station.