Harvard symbologist Robert Langdon is recruited by the Vatican to investigate the apparent return of the Illuminati – a secret, underground organization – after four cardinals are kidnapped on the night of the papal conclave.
An American girl on vacation in Italy finds an unanswered "letter to Juliet" -- one of thousands of missives left at the fictional lover's Verona courtyard, which are typically answered by the "secretaries of Juliet" -- and she goes on a quest to find the lovers referenced in the letter.
In the midst of World War II, the battle under the sea rages and the Nazis have the upper hand as the Allies are unable to crack their war codes. However, after a wrecked U-boat sends out an SOS signal, the Allies realise this is their chance to seize the 'enigma coding machine'.
