In a suspense thriller set during the days of the Cold War, director Reed mines territory gone over already in THE THIRD MAN but changes the locale to Berlin. Bloom, a British miss, arrives in Berlin to holiday with her doctor brother, Toone, and his wife, Neff, a German national. Neff is
tailed by young Krause (who follows her on a bicycle) and is threatened on the phone. Neff and Bloom take a short day trip to East Berlin where they meet Mason, a onetime attorney who now deals in black market items as well as lures people across the line into the Eastern sector for the
communists. Neff balks when Bloom decides to go ice skating with Mason. Bloom invites Mason to ...