The new Detective Inspector Horton mystery - Friday the thirteenth starts badly for DI Andy Horton. Convicted Murderer, Luke Felton, has gone missing, at the same time a decomposed corpse is washed up in Portsmouth harbour. But before Horton can get to grips with either case, he is called to the house of a woman he had met only the day before, to find her brutally murderer. Is Luke Felton the prime suspect, or is his body in the mud of the harbour? Horton is under pressure, and little does he suspect that things are about to get a whole lot worse.