A Murder of Quality recap

Ailsa Brimley, editor of a small nonconformist weekly, receives a letter from a reader, Stella Rode, saying that her husband intends to kill her, and takes it to her old wartime colleague George Smiley. Before anything can be done, Stella is beaten to death at her house on the edge of Carne, an ancient public school where her husband teaches science. Smiley goes down, is admitted to the school through the housemaster Terence Fielding, and works alongside Inspector Rigby. Carne assumes the murderer is either Stanley Rode, an outsider by birth and manner, or a local vagrant woman found with the dead woman's belongings; physical evidence has been arranged to incriminate the husband. Smiley finds that Stella's reputation for saintliness concealed a talent for collecting and using other people's shameful secrets. She had proof that Fielding had shown an examination paper to a boy in his house, and knowledge of an older disgrace that would have destroyed him. Fielding killed her to end it, staged the scene against Rode, and later killed the boy when he began to talk. Confronted, he confesses, and Smiley returns to London.

Ailsa Brimley edits a small nonconformist weekly with a loyal, mostly elderly readership. A letter arrives from Stella Rode, a long-standing subscriber and the daughter of a man the paper once honoured, saying plainly that her husband is planning to kill her, and asking that nothing be done for the moment. Uneasy, Ailsa takes it to George Smiley, with whom she worked in intelligence during the war and who is now retired and living quietly in London. Before they can decide how to respond, news comes that Stella Rode has been found beaten to death at North Fields, the house she shared with her husband on the edge of Carne, an ancient and expensive public school where he teaches science. The murder took place on a snowy night after a dinner at the house of Terence Fielding, a senior housemaster. Smiley travels down to Carne, where the county police, in the person of Inspector Rigby, are conducting an investigation hemmed in on all sides by the school's dislike of publicity.

Smiley is admitted to Carne society because Fielding's brother served with him in the war, and he begins to move between the school and the police station. Rigby shows him the case as it stands. Clothing belonging to Stanley Rode, along with other items, has been found in an outbuilding, footprints cross the snow, and the pattern of evidence points steadily at the husband. Rode himself is a nervous, meticulous man from a modest background who has laboured to be accepted at a school that will never accept him, and Carne's masters and their wives, among them the fastidious Felix D'Arcy and the formidably gracious Shane Hecht, make it clear that they regard him as a social intruder and would find his guilt unsurprising. The town, meanwhile, prefers a different culprit: Jane Lyn, a vagrant woman who lives near the house and has been found with belongings that had been Stella's. Smiley is struck by how conveniently the evidence has arranged itself and by how much everyone wishes to believe it.

Smiley begins to take apart the picture of the dead woman. Carne remembers Stella Rode as humble and charitable, active in her chapel, generous to the poor and to Jane Lyn in particular. What Smiley uncovers is a woman who studied the people around her for weaknesses and enjoyed possessing them: who humiliated her husband socially while appearing to support him, who told damaging stories in the guise of confidences, and who kept what she learned rather than using it openly. The letter she sent to the newspaper begins to look less like a frightened appeal than another move in a private campaign. At the same time Smiley picks at the physical evidence: the way the incriminating objects were placed, the timing of the walk home from Fielding's dinner and the movements of everyone who was at that table. The case against Rode is too complete, and the objects that convict him were left where they were certain to be found.

Attention narrows to Fielding, whose career at Carne is ending in disappointment and who is due to retire. Smiley learns that a boy in his house, Perkins, was in danger of being removed from the school after failing an examination, and that his paper was not what it should have been. Perkins is questioned and is frightened and evasive, unwilling to say anything against the housemaster who protected him. Shortly afterwards the boy is killed in what appears to be a road accident. Smiley concludes that Stella Rode had come by proof of what Fielding had done for the boy, and by knowledge of an older episode in his past that he had spent a lifetime burying, and that she had kept both without ever making a demand, so that he lived under her observation. The murder was Fielding's release from her, and the evidence in the outbuilding was placed to hang it on a husband nobody at Carne would defend.

Smiley sets his reconstruction in front of Fielding, who admits to killing Stella Rode and to killing Perkins when the boy began to talk, and he is arrested. Jane Lyn, whom the town had already convicted, is cleared. Stanley Rode is innocent of the murder, but the investigation has stripped away the marriage he defended: the wife everyone praised for her goodness had made a study of his shame, and he has no future at the school he tried to be worthy of. The masters and their wives close ranks around the school's reputation, less troubled by two deaths than by the noise. Smiley, who has no official standing and wanted none, leaves Carne with Ailsa Brimley and returns to London, having proved only that a closed community will believe any story that protects its own and blames an outsider.

Smiley establishes that Fielding had let the boy Perkins see an examination paper in advance so that he would not be removed from the school, and that Stella Rode obtained proof of it, along with knowledge of an earlier disgrace which Fielding had spent his career living down. Instead of exposing him she kept the evidence and let him understand that she had it, which was the private cruelty she practised on many people while the town admired her charity. With retirement and his reputation in front of him, Fielding killed her, and dressed the crime to point at her husband, whom Carne would have been happy to believe capable of it. When Perkins begins to talk about the examination paper, Fielding kills him too, in what is arranged to look like a road accident. Confronted with the reconstruction, Fielding admits what he did, and is arrested. Jane Lyn, who was the town's preferred culprit, is cleared. Stanley Rode is left innocent of the murder but with the truth about his marriage and no place at the school he tried so hard to enter. Smiley goes back to London with Ailsa Brimley, having exposed a killing that the school would rather have blamed on an outsider.