Crime and Criminal

When Mr. Thomas Tennant got on a train from Brighton to Victoria he was unpleasantly surprised to see Nelly, a woman that tricked him thousand and one time, and whom he thought she was dead for seven years. They struggle in a carriage and the woman falls through the door and out of the train. Still confused with what happened, at the next station Tennant meets a certain detective who is looking for a missing woman named Louise O'Donnel. Tennant chooses not to share the story of his incident, believing Nelly is now really dead. But is she?