The darkling spy

London, 1956. A generation of British spies are haunted by the ghosts of friends turned traitor. Henry Bone, a Mandarin spymaster, learns that Butterfly is the Holy Grail of Cold War Intelligence. In reality, he is an aristocratic pervert whose political tastes are as ugly as his sexual preferences. But worst of all for some, Butterfly can identify each traitor ghost and every serving British spy who helped them.