Headlights emerged in the tunnel, growing brighter until the train roared into the station, brakes screaming.The doors slid open.Daniel stepped inside.So did the woman.The carriage was entirely empty.He took a seat near the center, glancing upward as the doors shut. The woman took a seat at the far end, her back to him. There was something about her posture—too erect, too stiff—that made his skin tingle.The train lurched forward.