After losing his wife to cancer, Alex Lambert feels that he and his profoundly deaf daughter, Charlotte, have found their place in the world, in the peaceful village of Northrop in Essex. But his slice of heaven turns to hell when 14-year-old Charlotte goes missing while walking home from a friend's house. Can he trust DCI Jack Finch and DS Helen Wyatt to catch the right man, or should he take matters into his own hands to ensure revenge?