One of the riskiest air raids of World War II occurred on August 1, 1943, over the oil fields at Ploesti, Romania --- Nazi Germany’s primary fuel source. The Allies believed that the destruction of Hitler’s oil refineries would shorten the war. Using an untested strategy, it was worth the gamble, but the mission did not go according to plan. With 53 aircraft and 532 crewmen lost, it was the costliest US air raid of the war. A true story, THE NAVIGATOR'S LETTER is a tale of uncanny coincidences: two friends from the same small Illinois town; both joined the Air Corps; both became navigators; both were assigned to B-24 Liberators; both flew missions over Europe; both of their planes were forced down over Ploesti; and both went missing in action.