All six episodes from the second series of the BBC drama starring Sarah Lancashire as a police sergeant in a rural West Yorkshire valley. While investigating a case of sheep-stealing, Sgt Catherine Cawood (Lancashire) discovers the decomposed body of a murdered prostitute who she later discovers is the mother of Tommy Lee Royce (James Norton). This revelation places Catherine at the centre of the investigation as a possible suspect while Royce continues to torment her from inside his cell with the help of his new accomplice Frances (Shirley Henderson). While she takes on a new case of human trafficking, Catherine deals with more complications in her personal relationships and is recommended by her bosses to undertake a course of counselling therapy.