One Lancaster bomber. The women who built it. And the men who flew it. 13th Mission tells the story of a fateful mission over France one week after D-Day in June 1944. In the spring of 1944 all of Europe was at war. Before it was over, a million Canadians would join the fight. Back home a million more worked day and night to supply guns, tanks, ships and planes - the arsenal of democracy. One warplane in particular - the four-engine Avro Lancaster bomber - became a legend. The women who built the bomber never met the men who flew it. Dedication - and the airplane itself - was what they had in common. This is the story of one plane, one act of heroism and the personal sacrifice endured on both sides of the Atlantic.