Divorced and lonely, Flora Wilson is distraught when she hears news of the death of little Charlotte Anderson. Charlotte’s father killed her and then himself, and although he left a letter with clues to the whereabouts of her grave, his two-year-old daughter still hasn’t been found.
Flora embarks on a quest to find Charlotte’s body to give the child’s mother closure, believing that by doing so she can somehow atone for her own failings as a mother. As she hunts in winter through the remote moors of the Scottish Highlands, her obsession comes to threaten everything that’s important to her â€" her job, her friendship with her colleague Philip Metcalfe and her relationships with her three grown up children.