A string of murders in 1883 are somehow linked to another string of murders in 1908. In each case it seemed that the police had solved the mystery, and yet there were loose ends that were never resolved. When yet another string of murders in 1933 stretches the deductive powers of Scotland Yard’s best detectives to the limit – and beyond – there may be one detective who can find the missing links and solve not only the present murders but the past killings too.
Last time, the killer even sent the police a list of those he intended to kill, and, to help in the investigations, the detectives engaged the services of Monica Le Vinchy, a psychic medium with a unique ability to forecast the exact date and time of death. Surely, knowing not only who but also when the victims would die, the police could not fail to catch the perpetrator? But does Monica have a hidden agenda?