The story takes place in post-war Paris, where American composer Jerry Mulligan (a struggling artist) falls for Genèvieve, a beautiful French girl. However, Genèvieve is already engaged to a wealthy and well-connected Frenchman, Henri. As Jerry navigates his feelings for Genèvieve, he befriends a street performer, Milo, who becomes a confidant and helps him win Genèvieve's heart.