Agatha Christie's Murder on the Orient Express Part Two: Strangers on a Train

We pick up where the demo left off, with Detective Locke hot on the trail of a missing girl. But how does the tragic kidnapping of a child in Massachusetts connect to a murder on a train in Europe? That, mes amis, is a question that will require a lot of little grey cells to answer. But in the meantime, there are puzzles to solve and suspects to question...