Gigi is the story of a young girl in 19th century Paris. Raised to someday be the mistress of a rich man, Gigi lives with her mother and grandmother, and takes lessons at the home of her aunt. The family has some connections, and have been great friends with rich playboy Gaston. Gaston is bored with his life, and his only joy seems to be in the company of Gigi and her family.
Aunt Alicia decides that the time is right for Gigi's entry into society. After dressing her up, she is presented to Gaston as a young woman. He is, at first, dismayed at the change. Gradually he realizes that he is attracted to Gigi, and takes her out on the town.
As the night progresses, Gaston sees the emptiness of his life and wants something more. He proposes to Gigi, and she gladly accepts.