Ever since killing the Fisherman one year ago, Julie James is still haunted by images of him after her. When her best friend Karla wins free tickets to the Bahamas, Julie finds this a perfect opportunity to finally relax. But someone is waiting for her. Someone who she thought was dead. Someone who is out again for revenge.
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'.