One of the most dazzling and adventurous writers now working in English takes on the enigma of the Cambridge spies in a novel of exquisite menace, biting social comedy, and vertiginous moral complexity. The narrator is the elderly Victor Maskell, formerly of British intelligence, for many years art expert to the Queen. Now he has been unmasked as a Russian agent and subjected to a disgrace that is almost a kind of death. But at whose instigation?