The Mercurius Express, or more famously known as the "Silver Express", left the dry, arid, exotic land of Anatolia on a cold winter afternoon full of rich dignitaries, traveling families, and individuals of varying backgrounds and origins. Steaming full speed on a four day journey through the treacherous mountainous regions of the continent to the prosperous and gleaming Gallia.

Detective Leon Cross had expected an entirely peaceful trip on the train. Cocktails, fine dining, and music with the company of twin brother and an old friend. But ever since he and his twin had opened their agency, trouble seemed to be following them everywhere, and this time it was of no exception. When a simple robbery case turn deadly, it is a race against time to find the elusive thief before danger befell everyone on the train.