In a Serbian village on Christmas Day in 1943, the Chetniks accept two downed American pilots and give them hospitality. However, finding out that the Germans are looking for the pilots, the Chetniks change their attitude towards them.

Dr. Karl Sternau, the personal physician of the count Bismarck, who spent much of his youth in Mexico, is sent back to that country during the occupation by French troops in the service of the Austrian 'Emperor' Maximilian, to carry an encouraging letter from U.S. President Lincoln to the nationalist Mexican president Benito Juarez.