On a cold day in 1966, 10-year-old Mary Thornton is taking her little brother home. That afternoon will change Mary's life forever. She is about to become the only witness to her brother's murder. Only a year after the death of her father, chief superintendent Terry Darnell, his daughter Stella is still reeling from the publicity storm around the case of Kate Rokesmith. But Stella has discovered a folder of unlabeled photographs of deserted streets among her father's possessions--and the first one is dated 1966.