In the fourth book in this gripping crime series, forensic scientist Rhona MacLeod is called in to investigate a chilling series of clues left behind after a young boy disappears. A six-year-old boy has vanished from his own back garden, his mother and grandmother horrifically murdered. At the scene, forensic scientist Rhona MacLeod finds a chilling talisman made from the bones of a child. Then the mutilated torso of an unidentified boy is pulled from the river. Rhona must decipher the talisman's meaning if she is to find the boy before he becomes the next link in the killer's chain.