London U. Professor Q.E. DeFyer is heading to Loch Ness, Scotland, to investigate the existence of a creature called a "water horse," sighted for centuries. But someone - or something - objects to his plans. Can your Investigators keep DeFyer safe - in London, on the train to Scotland, and at the Loch? And can you discover the true nature of the Lurker in the Loch? An 1890s Call of Cthulhu event by William A. Barton, designer of Cthulhu By Gaslight.