Enigma plot
"He was a man without a country. A face they couldn't trace. A man without a chance. An enigma."
The CIA discovers a Russian plot to kill five people who have defected to the United States on Christmas Day, but does not know where these people are. Turner Alex Holbeck (Martin Sheen) is recruited by the CIA in Paris and sent across the Iron Curtain to steal an Enigma device: an encryption machine used by the KGB to encrypt its messages. As soon as he arrives, Holbeck discovers that the KGB and the East German government are aware of his arrival and that his contacts have been arrested.