Travel writer Thomas Nesbitt, age 50, retreats into his house in Maine to wallow in memories of living in Germany 25 years earlier after the success of his first book. In West Berlin as a worker for Radio Liberty, Thomas meets his soul mate, Petra Dussmann, a translator with an iron curtain around her heart. Petra's mysterious melancholy proves irresistible, and as Thomas is drawn into a passionate affair, he also becomes entangled in spy games played...