The Torso

Part of a human torso washes up on a beach near Goteborg, Sweden. It is so mutilated that gender is only established by DNA testing. A similar crime, now several years old, remains unsolved in Denmark.
Detective Inspector Irene Huss, a wife and mother as well as a member of the Swedish Violent Crimes Unit, is called upon to liaise with the police in Copenhagen. There she finds a clue: a beautifully rendered sign for a gay sex shop which is very like the tattoo on the mutilated torso.
Then a third murder takes place, and a fourth, and these new victims are connected to Inspector Huss. She begins to fear that the killer is tracking her, targeting her acquaintances. There is a chilling suggestion that he - or she - is one of her colleagues.