The disappearance of a vulnerable young man draws Perez into the troubled history of a family recently arrived from Glasgow. The missing man embraced life in Shetland and the community took him to its heart. Have the vengeful ghosts of the past caught up with him, or did an intense, new relationship turn sinister? Something about this elusive figure is not as it seems. When a breakthrough in the case reveals a danger greater than anyone could have feared, it falls on Jimmy Perez to save Shetland from an unimaginable threat.