A stylish, edgy spy thriller set in the Cold War, where enemies and allies can't always be separated, and espionage means getting your hands dirty. When a defecting KGB officer reveals the existence of a devastating Soviet plot, codenamed Operation Glass, the charismatic but paranoid head of MI5, known simply as Daddy, assembles a secret committee of intelligence officers to investigate. Are they the best? Or are they the only ones he trusts in a world where double agents, secrets and lies are normality?