一列火车在晚上停在了农村。似乎发生了什么事故。当一名专家到达时，调查已经结束并且乘客已经离开。他只有十分钟的时间来发现到底发生了什么事。

A train has stopped, at night, in the middle of the countryside. An accident seems to have occurred. The investigation is over and the passengers have left when a specialist arrives. He has got ten minutes to discover what really happened.