Replying...
Intro. This story comes from a murder mystery in a train moving in the snowy place, and this story is about the date 1931, June 9 in London. A train was in made in London called The Metropolitan Train, and it was about to be use on its fourth try as a public transport before being published in the Public. (Caption: There will be one Detective, one Murderer, and then 13 civilian including the conductor of the train, you can pick which character can be a detective or murder)

Murder Express Mystery

@Jacob