The death of Sylvia Kaye figured dramatically in Thursday afternoon's edition of the Oxford Mail. By Friday evening Inspector Morse had informed the nation that the police were looking for a dangerous man - facing charges of willful murder, sexual assault and rape. But as the obvious leads fade into twilight and darkness, Morse becomes more and more convinced that passion holds the key....

Little progress had been made by the Thames Valley Police since the discovery of a corpse in a North Oxford flat. The victim had been killed by a single stab wound to the stomach. The police had no weapon, no suspect, no motive, but within days of taking over the investigation, Chief Inspector Morse and Detective Sergeant Lewis uncover startling new information about the life and death of the victim, Dr. Felix McClure, late of Wolsey College, Oxford.

Anne Scott's address was scribbled on a crumpled note in the pocket of Morse's smartest suit....He turned the corner of Canal Street, Jericho, on the afternoon of Wednesday, October 3rd. He hadn't planned a second visit. But he was back later the same day - as the officer in charge of a suicide investigation.

Lady Emily Hardcastle is an eccentric widow with a secret past. Florence Armstrong, her maid and confidante, is an expert in martial arts. The year is 1908 and they've just moved from London to the country, hoping for a quiet life. But it is not long before Lady Hardcastle is forced out of her self-imposed retirement. There's a dead body in the woods, and the police are on the wrong scent. Lady Hardcastle makes some enquiries of her own, and it seems she knows a surprising amount about crime investigation...

Morse had solved so many mysteries in his life. Was he now, he wondered, beginning to glimpse the solution to the greatest mystery of them all? How can the discovery of a short story by a beautiful Oxford graduate lead Chief Inspector Morse to her murderer? What awaits Morse and Lewis in Room 231 of the Randolph Hotel? Why does a theft at Christmas lead the detective to look upon the festive season with uncharacteristic goodwill? And what happens when Morse himself falls victim to a brilliantly executed crime?