A haunted house, a broken family and a body that has never been found... January, 1987: Helen Honeysett, a young newlywed, sets off for an evening run from her Thames-side cottage. She never comes home. January, 2016: Twenty-nine years later, Helen's body has never been found. Her husband asks private detective Stella Darnell to find out what happened all those years ago. But how can you hunt a killer whose trail has long gone cold?