By striking sixteen-year-old Urszula Kuchinsky with a club during a demonstration, a Berlin police officer—without knowing it—sealed her fate. The girl from an educated Jewish family, whose father and brother held leftist views, became a loyal supporter of communism and spent twenty years spying for the Soviet Union. Agent Sonya received her baptism of fire in Shanghai from Richard Sorge, went through an intelligence school in Moscow, nearly took part in an attempt on Hitler, personally assembled radio transmitters, and during World War II passed atomic secrets to the USSR that she obtained from the intelligence officer Klaus Fuchs—and she never once failed an assignment. Sociable and cheerful, she fell in love and raised children, cared for her parents—and gave the clumsy investigators of Mi-5 no reason to suspect her of a double life. The fate of Ursula Kuchinsky—Gam burger—Burton is an astonishing example of how one can stay faithful to one’s beliefs without betraying—or being betrayed—in a world seized by catastrophe, where black and white change places or merge into one. Perhaps her secret lies in the ability to love and change without losing herself.