- Directors: Alfred Hitchcock
- Producers: Alfred Hitchcock
- Writers: Ben Hecht
- Genres: Drama, Film-Noir, Romance, Thriller
- Actors: Ingrid Bergman, Cary Grant, Claude Rains
Alicia Huberman (Ingrid Bergman), the American daughter of a convicted Nazi spy, is recruited by government agent T. R. Devlin (Cary Grant) to infiltrate a group of Germans who have relocated to Brazil after World War II.
While awaiting the details of her assignment in Rio de Janeiro, Alicia falls in love with Devlin. His feelings for her are complicated by his knowledge of her wild past. When Devlin is ordered to convince her to seduce Alex Sebastian (Claude Rains), one of her father’s friends and a member of the group, Devlin tries to convince his superiors that Alicia is not fit for the job. But upon seeing Alicia again, he puts up a stoic front, choosing duty over love. Alicia concludes that he does not love her, and she soon marries Alex to better spy on him and his associates.
Alicia and Devlin discover the key element of the plot by accident, but in the process leave a clue that her husband traces back to her. Now Alex has a problem: he must silence Alicia, but cannot expose her without being discredited by his fellow Nazis. Alex discusses the situation with his mother (Leopoldine Konstantin), who suggests that Alicia “die slowly” by poisoning. The poison is initially mixed into Alicia’s coffee, and she quickly falls ill. Devlin becomes alarmed when she fails to appear at their next rendezvous. After driving to Sebastian’s house, he sneaks into Alicia’s quarters, where she tells him that Alex and his mother are poisoning her. After confessing his love for her, Devlin carries her out of the mansion in full view of the conspirators. Alex privately begs to go with them, but they abandon him to the non-existent mercy of the Nazis, who had previously disposed of another co-conspirator for a far lesser indiscretion.