You work as a detective. You decided to travel to another city for your vacation. You took the subway, but you were very tired and fell asleep. When you woke up, you found that the subway hadn't left on schedule. So you try to find out why.

You work as a detective. You decided to travel to another city for your vacation. You took the subway, but you were very tired and fell asleep. When you woke up, you found that the subway hadn't left on schedule. So you try to find out why.
