When a dead service cabinet on an old harbor line shows signs of recent use, Paul Andrews knows he is not looking at forgotten infrastructure. He is looking at a route that was never supposed to wake again.As Paul and forensic investigator Anna Calder follow the line through service roads, storage yards, and paper-trail rooms built to look ordinary, they uncover a buried transfer system still moving under the surface of the present. Someone has preserved it. Someone is using it. And someone inside Black Desk is already closing in.Dead Drop is a cold, procedural espionage thriller about hidden routes, buried contact lines, and the danger waiting at the far end.