It is January 1941, and the Blitz is devastating England. Food supplies are low and tube stations have become bomb shelters. As the U.S. maintains its sceptical isolationist position, Winston Churchill knows that Britain is doomed without the aid of its powerful ally.
As bombs rain down over London, a weary Harry Hopkins, President Roosevelt's most trusted advisor, is sent to London as his emissary, and comes face to face with the Prime Minister himself and an attractive and determined young female driver who may not be what she seems.