Notorious (1946)

It is 1946 and while World War II might be over, Nazis still loyal to the Third Reich can be found. Alicia Huberman's (Ingrid Bergman's) father was such a man, and he has just been convicted of treason in the U.S. Ms. Huberman did not share her father's views, but has gained notoriety as the daughter of a convicted traitor. U.S. Intelligence, in the form of Mr. Devlin (Cary Grant), see this notoriety as an opportunity, recruiting her to infiltrate a group of Nazis living in Rio de Janeiro, Brazil. The group is lead by Alexander Sebastian (Claude Rains), an ex-flame of Alicia. Alicia manages to infiltrate the group, but her previous relationship with Sebastian complicates things, as does her developing relationship with Devlin.

IMDb: https://www.imdb.com/title/tt0038787