Halloween rolls around and Edward tells the engines of a ghost engine that roams the Smelters, searching for his lost whistle. Thomas, Percy and Duck are sent to the Smelters to collect a special load, where Thomas teases Percy when he gets scared. Duck feels sorry for Percy and volunteers Thomas to be left on his own.

The engines' collective dislike for being a middle engine is taken advantage of by 'Arry and Bert when they play a trick on Percy by shunting trucks in front of him. Henry accidentally bumps him onto the coal tipper, so James takes over. However, he is not immune from 'Arry and Bert's tricks himself.