Spud and the Vegetable Garden

Four vegetables are left behind in a vegetable garden. Potato, the most inquisitive of them all, sets out to find the gardener, but gets lost along the way. Following in their friend's footsteps, Broccoli, Leek and Carrot find him at the bottom of a well. Together, they arrive at a strange greenhouse where a monstrous vegetable lives... But where has the gardener gone, and who is he really?