Mr. Blake commutes to work by train and is followed by a Miss Dent who is obviously desperate to speak to him. She sits next to him on the train and threatens to kill him if he doesn't listen to her. She has been hospitalized for eight months after suffering a mental breakdown. It seems she once worked as his secretary but lived a very lonely life with few friends. After spending the night together however, Blake has her fired and she is clearly intent on revenge.
—garykmcd