Sent on a mission to Paris to control the work of three Soviet agents, a rigid and stern Russian Communist commissary opens her heart for the beautiful eyes of an aristocratic man and a neat little hat. Based on a screenplay written by Billy Wilder and Charles Brackett, Lubitsch's movie depicts a world of luxurious hotels, revolving doors, penniless nobility and moral aristocracy of the servants. Considered as Lubitsch's masterpiece, the movie was ironically defined as the "Wien-Berlin-Hollywood axis".