The day was going well so far. Detective Alexander Nosov and his assistant Rutva Mustafa, had just arrived in Edinburgh and were boarding a train that would take them all the way to London where they are going to attend a convention.

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The next morning they awake to an ordinary day and Rutva meets one of the wealthy passengers named Tristan Stoll. While they are talking to the conductor in the front of the train, they hear a scream from the first class bathroom and find Tristan Stoll dead.