Eager to make a new start and to give their autistic son a better life, an English family move to the Shetland Islands,. But when a young nanny's body is found hanging in the barn of their home, rumours of her affair with the husband begin to spread like wild fire. With suspicion raining down on the family, DI Jimmy Perez is called in to investigate. For him it will mean returning to the islands of his on-off lover and boss Willow Reeves, who will run the case. Perez is already facing the most disturbing investigation of his career, when Willow drops a bombshell that will change his life forever. Is he ready for what is to come?