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'.
Private eye Philip Marlowe and his bride move to a desert town, where he uncovers a land scheme.
Against formidable odds -- and an old-school diving instructor embittered by the U.S. Navy's new, less prejudicial policies -- Carl Brashear sets his sights on becoming the Navy's first African-American master diver in this uplifting true story. Their relationship starts out on the rocks, but fate ultimately conspires to bring the men together into a setting of mutual respect, triumph and honor.