John Dee arrives in Glastonbury, where according to Giraldus Cambrensis some centuries ago a successful excavation of King Arthur's remains has taken place. When Dee's supporter Robert Dudley gets seriously sick, the local healer Eleanor Borrow is supposed to cure him. She goes fetching mineral water from the Chalice Well because she thinks it increases the impact of her herbal medicine. Later, when the mutilated corpse of Dudley's servant is found, Eleanor Borrow is suspected to have murdered him as a satanic ritual.
Part 3
John Dee learns that Queen Elizabeth is haunted by nightmares because it is unclear what happened to Arthur's bones. Still his search remains futile. He meets secretly with Eleanor Borrow. She informs him that her late mother worked with John Leland. Craving for visions he talks her into giving him some of her mother's most dangerous elixir. When he awakes after his trip, she has disappeared.
Part 4
John Dee continues his search and even excavates Eleanor Borrow's mother. In her coffin he finds a map she made together with the famous antiquarian John Leland. This reveals to him what Richard Whiting wouldn't disclose even under the most severe torture. But Eleanor has been arrested and sentenced to death.
Edmund Bonner is an English bishop who warns that French Catholics take the current English Queen for a witch.
Peter Carew is an adventurer who leads John Dee to Glastonbury
Robert Dudley, 1st Earl of Leicester pretends to be a member of the Queen's Commission on Antiquities
Sir Edmund Fyche is a local authority who once hanged Eleanor's mother for alleged necromancy and accuses Eleanor too
Joan Tyrre is a woman who cherishes folklore and believes in it
Historical inaccuracies
Phil Rickman admits in the book's Notes and Credits that according to contemporary records Joan Tyrre lived in Taunton.
Reception
The novel received mixed reviews. Jennifer Monahan Winberry considered Rickman's tale enjoyable for connoisseurs of the Arthurian legend but also for aficionados of the Elizabethan era. Margaret Donsbach wrote the plot progressed "slow-moving at times" but a readership "interested in the Renaissance approach to science and the occult" would appreciate the novel as "an authentic, insightful portrayal of the period". Amanda Gillies praised Rickman for his diligent research and recommended his novel strongly for readers who relish historical crime stories. Kirkus Reviews published a similar opinion and judged Rickman had described historical persons "with admirable scholarship and verve". Publishers Weekly reviewer on the other hand complained Rickman's novel wouldn't "do justice to the intriguing Dee" and pointed out that Dee also was a mathematician.