Detective Sergeant Catherine Bishop has an enigmatic new boss, Detective Inspector Jonathan Knight. How he will adapt to life in Lincolnshire after years in the Met is anyone's guess. When the body of a well known local thug is discovered, an intriguing message found on his battered corpse raises unwelcome questions. Is DS Bishop herself being accused of the grisly murder, or does the message point to a more sinister secret? As the body count grows higher, Bishop and Knight find themselves in a race against time to discover the identity of a merciless, faceless killer whose motivation is a mystery.
Great reading as a police procedural demonstrating just how difficult it can be to solve murders that initially seem random, or where the link is buried deep in the past.
By the final chapter I had guessed who the murderer was though.