Detective Sergeant Cathal Breen knows the sight of a murdered prostitute will be with him for the rest of his life. But this is what he does: he finds killers. Helen Tozer, more than most, understands why. The girl had a client list full of suspects: all rich, powerful - protected. Breen begins to fear that this is more than the murder… it's political. Breen knows he has more to lose than ever before, but he can have no sympathy for the devil.