Halloween 1861. A special train with two carriages steams across the Lake District at night on its way to a place notorious for its record of supernatural incidents. Most of those on board have been fortified by alcohol so the mood is boisterous. Lighting inside the carriages is poor and without warning, the lamp goes out in the last compartment of the second carriage, plunging it into darkness. When the special reaches the end of its journey, the passengers pour out on to the station platform. There are almost sixty of them in all, laughing and jostling. The prevailing excitement is shattered by a cry - a dead body has been discovered in the seats. This will prove to be a very puzzling new case for the Railway Detective.