When a child goes missing in Inverness, DCI Callum MacBain and his new partner will find that is only the tip of the iceberg. A bloody scarf, a criminal father, and an ancient castle mark the trail, and before Callum knows it, that simple missing persons case turns into a deadly web of greed and lies. Can MacBain cut through it all in time to save the child's life? And, if so, what will be the cost?