They will learn the city's secrets. They will learn who plans to kill... A man has jumped in front of a late night train. Stella Darnell, a cleaner who solves crimes, suspects it's murder. Now she's stirring up the past with questions that no one wants to answer. Jack Harmon, a driver on the Tube, has a new home at the top of an old water tower, with a perfect bird's eye view of London. If he watches through binoculars, he will learn the city's secrets. He will learn who plans to kill... THE DETECTIVE'S DAUGHTER SERIES: The Detective's Daughter. Ghost Girl. The Detective's Secret. The House With No Rooms. The Dog Walker.