Il Trenino Della Val Gardena [The Val Gardena Railroad]

1916: you are Russian prisoners building the railroad that is intended to help enforce the front lines of the Austro-Hungarian Empire during the World War I. It is almost finished, but you have enough of this miserable life. Fortunately one day you hear someone talking about an escape plan using the railroad itself. It seems that a Russian friend of yours managed to modify the engine so that you would be able to start it. But who is this man? Is he still alive? Where is he hiding the plans?