Spring, 1543. King Henry VIII is wooing Catherine Parr, whom he wants for his sixth wife. Archbishop Cranmer and the embattled Protestant faction at court are watching keenly, for Lady Catherine is known to have reformist sympathies. Matthew Shardlake, meanwhile, is working on the case of a teenage boy who has been placed in the Bedlam insane asylum, and fears that the boy's terrifying religious mania could lead to him being burned as a heretic. When an old friend is horrifically murdered, Shardlake promises his widow that he will bring the killer to justice. His search leads him to Cranmer and Catherine Parr - and to the dark prophecies of the Book of Revelation. As London's Bishop Bonner prepares a purge of Pretestants, Shardlake, together with Jack Barak and his physician friend Guy Malton, investigates a series of horrific murders which soon bring talk of Witchcraft and demonic possession - for what else would the Tudor mind make of