"In the vaults beneath London's Baker Street station are thousands of stories waiting to be told. For Natalia O'Shea, new to the city and to her job in the famous Lost Property Office, it all begins with a haunting picture of missing woman Helen Bookman. Driven by compassion, she's determined to find Helen and reunite her with her distraught husband, but with every clue she uncovers the more the mystery deepens - and events take a sinister turn when Natalia discovers a pair of Helen's bloodstained shoes..."--Publisher description.