Monty is allergic to ghosts. If there's an invisible ghost around, he sneezes. As soon as Monty sets foot in the Brinsley Codd School for Sensible Thought, he knows it's haunted. Why else would he sneeze like a hurricane?

Mysterious forces are clearly at work, yet Monty has problems convincing the principal, and a loathsome teacher called Sogbucket, that the school is really haunted.