Philo Trollsondrum is just an ordinary  734-year-old boy living in Upper Buttblastston, until he sees a  horrifying troll, called Hal Robbuttson, climb in through his bedroom  window.

Hal, who is built like a potato filled with rocks and smells like  grated butt smothered with sauce made from ass, sings a song about  making little boys into sausages.

Philo tricks the troll into falling out of his window by telling him  that there are child-brain cheesesteaks outside. He realises that the  troll has to be stopped before he eats any more children and sets to  work trying to invent a trap.

Meanwhile, in a cave just outside Upper Buttblastston, Puzzleton  Evidency starts to suspect that eating children is wrong, and grows  tired of hunting with his fellow trolls. He decides to live as a  vegetarian.

After a brief misunderstanding involving a forgotten appendage and  lashings of ketchup, Philo and Puzzleton team up to stop the trolls,  using a catapult that fires rutabaga. They lure the trolls by creating a  big mound of boogers.