Ernst Lubitsch has succeeded in bringing together three talented performers and getting them to interact effectively, avoiding a descent into predictable sentimentality. The story revolves around the captivating "Lady Maria" (Marlene Dietrich), who is married to her devoted, though perhaps not particularly vibrant, diplomat husband "Sir Frederick" (Herbert Marshall). Experiencing some loneliness during his absences, she travels to Paris to see her friend, the Russian Grand Duchess "Anna" (Laura Hope-Crews). As was typical for women of high social standing, her role primarily involved bringing together influential people at lavish parties, and it is at one such event that "Maria" meets the somewhat disreputable "Halton" (Melvyn Douglas), setting the stage for a love triangle to unfold. She has been using a different name ("Angel") in France, and when it’s revealed that her husband and this new admirer share wartime history – and they are both invited to the same event – things become complicated! The storyline isn't particularly innovative, but there are four noteworthy and absorbing performances to appreciate. Dietrich and Douglas have good chemistry on screen; Marshall consistently portrays that detached, dignified persona well, and Crews skillfully navigates situations to ensure she gets what she wants from the various difficulties she finds herself in. It’s also aided by a limited number of actors, brisk and witty conversations, and pleasing visuals.

Source on TMDB