When you boarded the train a few days ago, you didn’t know what to expect. This was your first time on a luxury train ride, after all.  The ride to your destination is scheduled to take five days, but, thus far, the opulent accommodations have made the travel more of an extravagance than a chore. On the morning of day four, however, you are awakened by a commotion in the hallway. Opening your door of your cabin, you hear the words every good detective story begins with: "There's been a murder." The victim is an anonymous gentleman who has no identification and no ticket. Who is he? How did he get on board? Why was he murdered?  Will the murderer strike again? Those are the questions you must answer as you attempt to solve the mystery of The Unknown Passenger.