He woke up because of the movement the train made when it came to a halt. People started to get up from their sits and reach for luggage that was safely stored over their heads. The sun went through the curtained windows in the whirl on glowing dust. Outside there were delicate arches of Grand Central in New York and bustling crowds of comers and goers. He bent over to pick up the newspaper he dropped while asleep, when he saw an envelope lying on the table. Inside there was a piece of paper with just one line “I know who you are”.