Audrey Hepburn, Fred Astaire and Kay Thompson star in this 1950s romantic musical comedy which features songs by George and Ira Gershwin. Jo Stockton (Hepburn) is a bookshop worker with intellectual pretensions. When she is discovered by Maggie Prescott (Thompson), the editor of a top fashion magazine, and asked to become the figurehead of a new collection, Jo is uninterested at first. However, she takes the modelling job when she learns from photographer Dick Avery (Astaire) that it would involve a trip to Paris, which would give Jo a chance to attend a lecture by her idol, philosopher Emile Flostre (Michel Auclair). As she and Dick embark on a series of photo shoots around the city, they begin to develop romantic feelings for one another. Will Jo's passion for philosophy affect her commitment to her work and to Dick?