Sir Paul Berowne gives his latest anonymous letter to Adam Dalgliesh and the next day visits Father Francis Barnes at St. Matthews Church in Paddington, requesting permission to spend one night alone in a spare room at his church. The next day, Sir Paul's body is found by Mrs. Wharton, a church volunteer, his throat slit. There was also a homeless man, Harry Mack, also dead in the room with him. Dalgliesh takes charge of the case and learns from Father Francis that he had only known Berowne for less than two weeks but had noticed something very peculiar at communion. Mack was a regular often seeking shelter at the church. Inspector Miskin looks into the death of Sir Paul's servant Diana Travers and they are surprised that the post-mortem was performed by the Special Branch pathologist.

—garykmcd

Commander Dalgliesh and Insp. Miskin continue their interviews with those associated with the case. Gordon Halliwell, the family chauffeur, came to the Berowne family after serving with the deceased Hugo in the army. He freely admits that he and Sir Paul didn't along. Barbara Berowne's brother Dominic Swayne has an alibi. Dalgliesh also questions him about the death of the Berowne family's servant, Diana Travers, who drowned. Swayne says she wasn't an unemployed actress as she claimed. Berowne's daughter Sarah didn't get on with her father and were estranged owing to political differences and the way he treated her mother. The pathologist won't rule out the possibility of suicide though he tells Dalgliesh it's most likely murder. Teresa Nolan the nurse who looked after Sir Paul's mother, admits to him that she had an abortion a few weeks before, but refuses to identify the father. She is later found dead, an apparent suicide.

—garykmcd