Mother Night is a 1996 American romantic war film based on Kurt Vonneguts 1961 book of the same name.
Confined in an Israeli jail, Howard W. Campbell, Jr. writes a memoir about his career in Nazi Germany. During the buildup to World War II, Campbell, an American playwright of German language stage productions, is approached by War Department operative Frank Wirtanen. Wirtanen asks Campbell to work as a spy for the U.S. in the approaching war, though he promises no reward or recognition. Campbell rejects the offer, but Wirtanen adds that he wants Campbell to take some time to consider, telling him that Campbells answer will come in the form of how he acts and what positions he assumes once the war begins.In the initial stages of the war, Campbell works his way up through Joseph Goebbels propaganda organization, eventually becoming the voice of English language antiSemitic broadcasts aimed at U.S. citizens. Unknown to the Nazis, all of the idiosyncrasies of his speech deliberate pauses, coughing, etc. form a secret code that covertly transmits information to Allied forces. Late in the war, after his wife, Helga, is reported killed on the Eastern Front, Campbell visits her family in Berlin in early 1945, just before the Red Army arrives. Helgas younger sister, Resi, confesses that she is in love with him. ........
Source: Wikipedia