Summer, 1939. British journalist John Russell has just been granted American citizenship in exchange for agreeing to work for American intelligence when his girlfriend Effi is arrested by the Gestapo. Russell hoped his new nationality would let him safely stay in Berlin with Effi and his son, but now he's being blackmailed. To free Effi, he must agree to work for the Nazis. They know he has Soviet connections and want him to pass on false intelligence. Russell consents but secretly offers his services to the Soviets instead.

It's a good plan, but soon things become complicated. A Jewish girl has vanished, and Russell feels compelled to search for her. A woman from his past, a Communist, reappears, insisting he help her reconnect with the Soviets. Meanwhile, Europe lurches toward war, and he must follow the latest stories?to places where American intelligence assignments await him.