Someone is killing homeless men. Someone is feeding them, bathing them, wrapping them in paper and- bizarrely- salt, stabbing them through the heart, and then dumping their bodies around the financial district of Bradfield. Tony and Alex pursue the available clues until a family bereavement pulls Alex away from the case. Suddenly Tony finds himself working with a new detective: ambitious young Oxbridge graduate Hall - against whom Tony is initially prejudiced until he discovers that he's dealing with a trained psychologist who’s a big fan of Tony's own work. Mentor and pupil dismiss sexual motives for the crimes, but the careful way in which the killer has treated each body suggests a ritual element in the deaths. Meanwhile, Tony becomes aware that someone is stalking him. Could it be Michael? And if so, how much danger is Tony in?