Drama series set in the 1950s and adapted from the novels by James Runcie. Sidney and Geordie look into the killing of a young factory worker in spite of mysterious forces attempting to bury their investigation. The body of Josephine Sutton is found below an open hatch high in the wall; she is dressed for a night out with a bottle of gin nearby. She appears to have fallen, but Geordie is immediately suspicious as the scene looks staged. Is someone trying to cover up a murder?