Twenty years before the events of the novel, the family of Sir Henry Thorpe, squire of the
Fenland village of Fenchurch St Paul, suffered the theft of a guest's valuable emerald necklace. The family's
butler, Geoffrey Deacon, and his accomplice, Nobby Cranton, were convicted and imprisoned, but the emeralds were never recovered. In 1918, Deacon escaped from prison and disappeared, leaving his wife, Mary, none the wiser. After a man's body in prison clothes was found two years later in a nearby
dene-hole, Mary was declared a widow, and married one of the village
bell-ringers, William Thoday. The novel opens with Lord Peter Wimsey running his car into a ditch near Fenchurch on a snowy New Year's Eve. Stranded for a few days while repairs are carried out, Wimsey helps ring an all-night
peal on the
church bells, filling in for William Thoday, who is ill with
influenza. Lady Thorpe, Sir Henry's wife, dies the next day. When Sir Henry dies the following Easter, a man's mutilated body is found in his wife's grave, believed to be that of a labourer calling himself 'Stephen Driver'. Oddly, the dead man was wearing French-made underclothes. The
rector writes to Wimsey asking him to return to investigate. At the Post Office, Bunter, Wimsey's
manservant, finds an uncollected letter posted from France. The writer is the French wife of a British soldier, Arthur Cobbleigh, who had
deserted in 1918. Cobbleigh evidently knew where the emeralds were hidden and plotted to recover them with 'Driver' – who is revealed to be not the mutilated man, but Cranton. parish church, Devon – similar to the
change ringing described in the book A document found in the
bell chamber is a
cipher, written on the same paper as the letter from France. Wimsey's knowledge of
change ringing enables him to decipher it, leading him to the emeralds, still in their hiding place in the church. He shows the document to Mary Thoday, and she and William promptly abscond to London. Wimsey deduces that Mary recognised the handwriting as that of Deacon, her first husband, who apparently was still alive at the time of the cipher's composition. Realising their marriage was unintentionally bigamous, the Thodays have gone to get remarried. Wimsey further deduces that the mutilated man was Deacon. After his escape, Deacon had killed Cobbleigh and swapped clothes and identities with him, leaving him in the dene-hole. After marrying
bigamously in France, Deacon had waited several years to return for the emeralds that he had hidden before his arrest. He had asked Cranton for help, sending him the cipher as a token of good faith. Cranton had broken into the church, discovered Deacon's body in the bell chamber, and fled in horror. William Thoday and his brother Jim, a
merchant seaman, are interviewed. William confesses that on 30 December he had encountered Deacon, whom he had long believed to be dead, prowling around the church. Desperate to protect his wife and children from the scandal of an illegitimate marriage, he had tied Deacon up and locked him in the bell chamber, planning to bribe him to leave the country the next day. Unfortunately, his bout of influenza prevented him from returning, and Jim discovered Deacon's dead body still tied up two days later. Still loyal to his brother, Jim had made the body unrecognisable, hidden it in Lady Thorpe's grave, and returned to his ship. When the body was rediscovered at Easter, each of the brothers thought that the other had killed Deacon. When Wimsey returns to Fenchurch the following Christmas, floods are threatening the countryside, and Wimsey climbs the tower as the bells are sounding the alarm. The appalling noise in the bell chamber convinces him that Deacon, tied there for hours during the all-night New Year peal, could not have survived: Deacon had been killed by the bells themselves. Wimsey explains, "We needn't look for a murderer now. Because the murderers of Geoffrey Deacon are hanging already, and a good deal higher than
Haman". William Thoday is drowned in the flood trying to save another man. Wimsey speculates that "I think perhaps he guessed at last how Geoffrey Deacon died and felt himself responsible". == Principal characters ==