Based on the novel by Erich Maria Remarque, Arch of Triumph is a complicated war romance directed by Lewis Milestone. Dr. Ravic (Charles Boyer) is a refugee physician practicing medicine illegally in Paris under a false name. He saves Joan Madou (Ingrid Bergman) from committing suicide after the sudden death of her lover. He gets her a job singing at the nightclub where his only friend, Boris Morosov (Louis Calhern), is the doorman. Joan falls in love with Ravic, but he is deported and she finds herself the mistress of wealthy Alex (Stephan Bekassy). Meanwhile, Ravic seeks revenge against a Nazi officer (Charles Laughton) and war is declared between France and Germany.