Orient Express

There is a murderer on this train… or maybe even more than one! Since yesterday, two passengers have gone missing, and last night, the body of one of them was found. Hercule Poirot has advised the train conductor and the police officer in charge to gather all passengers, including himself, in the train's main restaurant. But just before the door is locked, you receive a message from Mr. Poirot: "Do not enter the restaurant! If I am not mistaken, the murderer is among us, but the key evidence will not lie in his guilt. I have left you a letter containing all the information I have gathered so far. While I keep everyone occupied for an hour under the guise of questioning, it is up to you to uncover the murderer!"