In Paris at the turn of the 20th century, a young girl named Gigi is being groomed by her grandmother and great-aunt to become a courtesan, in line with the family tradition. Gigi spends her days learning etiquette, history, and the ways of high society under their strict guidance. Simultaneously, Gigi enjoys a carefree and playful relationship with Gaston, a wealthy playboy and family friend who finds refuge from his mundane aristocratic obligations in her company. Unbeknownst to them, their friendship begins to deepen, challenging the societal expectations placed upon them.

As Gaston becomes increasingly disenchanted with the superficiality of Parisian society and the pressures of his class, he finds genuine joy and solace in his moments with Gigi. Meanwhile, Gigi grapples with the realities of her imminent role within society, torn between the expectations of her upbringing and her desires for a life beyond the confines of tradition. Their growing bond is tested as they navigate their feelings for each other against the backdrop of a rigid social structure that dictates their every move.