Berlin, early 1948. The city, still occupied by the four Allied powers, still largely in ruins, has become the cockpit of a new Cold War, and as spring unfolds its German inhabitants live in fear of the Soviets enforcing a Western withdrawal. Here, as elsewhere in Europe, the legacies of the War have become entangled in the new Soviet-American conflict, creating a world of bizarre and fleeting loyalties, a paradise for spies. John Russell works for both Stalin's NKVD and the newly-created CIA. He does as little for either as he can safely get away with, and between the tawdry tasks they set him—assessing dubious defectors in Trieste, running a spy ring in a Berlin VD clinic, rescuing ex-Nazis who might prove useful from Czechoslovakia—he seeks a way to cut himself loose. His partner Effi Koenen has an easier time, starring in a popular radio series and looking after their adopted daughter Rosa, until a woman she helped save in the War turns up on her doorstep, and admits to a child she left behind all those years before, a child now trapped behind the new iron curtain.