London. Early morning, June 2019: on the foreshore of the river Thames, a bag of bones is discovered. DCI Samuel Owusu is called to the scene and quickly sends the bag for forensic examination. The bones are those of a young woman, killed by a blow to the head many years ago. Clues lead back to the Chelsea mansion where a chilling crime was committed many years previously. The nerve-shredding sequel to the bestselling "The Family Upstairs"