Bletchley Park: the top-secret landmark of World War Two, where a group of young people were fighting to defeat Hitler, and win the war. March 1943, the Second World War hangs in the balance, and at Bletchley Park a brilliant young codebreaker is facing a double nightmare.

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'Top-class' The Times

March 1943, the war hangs in the balance, and at Bletchley 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 Bletchley, Jericho's girlfriend, the beautiful and mysterious Claire Romilly, suddenly disappears.

'A compulsive page turner' Daily Mail
'As human, intelligent and gripping as documentary fiction can get' Financial Times

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