Thirteen years after the "Lawnmower Killer" killed her sister, high school student Mary Graves and obsessed detective Dick Harbinger are on the lookout for the killer to reappear during the annual Halloween Pumpkin Prom.
Babe, fresh from his victory in the sheepherding contest, returns to Farmer Hoggett's farm, but after Farmer Hoggett is injured and unable to work, Babe has to go to the big city to save the farm.