Enigma

March 1943,nthe war hangs in the balance.At Bletchey Park Tom Jericho,a brilliant young codebreaker,is facing a double nightmare.The Germans have unaccountably changed their U-boat Enigma code,threatening a massive Allied defeat,and,as suspicion grows that there may be a spy inside Bletchey,Jericho`s girlfriend,the beautiful and mysterious Claire Romilly,suddenly disappears.