The coastguard's residence Chamber Cottage, which sits high up on the North Yorkshire cliffs, overlooking The North Sea, holds many dark secrets.Alec and Peggy are struggling to overcome their marital problems. Both damaged by issues from their childhoods, they are trying to get on with their lives. But this is hard for them to do when they both believe they are being watched. As a result, Peggy, who has terrible scars on her face, becomes more agoraphobic.To make matters worse, Peggy discovers her estranged mother is stalking both she and Alec, claiming she has a dark secret that is putting Peggy in danger.What caused the scars on Peggy's face? Is Alec really the monster Peggy's mother believes him to be? And what secrets does Chamber Cottage hold?