In 1939, newly created British intelligence agency MI6 recruits Cambridge mathematics alumnus Alan Turing to crack Nazi codes, including Enigma -- which cryptanalysts had thought unbreakable. Turing's team, including Joan Clarke, analyze Enigma messages while he builds a machine to decipher them. Turing and team finally succeed and become unsung heroes, but in 1952, their quiet genius leader encounters disgrace—Jwelch5742