In the mid-1970s, the CIA and KGB both suspected Karel Koecher was working for the enemy. They were both right. After graduating from Columbia, he swiftly entered the ranks of the CIA, becoming a double agent during the height of the cold war. Using newly declassified documents, interrogation tapes and extraordinary first-hand accounts from the Koechers themselves, Benjamin Cunningham reconstructs their double lives and the fading Cold War, where a strange moral fog made it hard to know what truth was being fought for, and to what end.