Léa de Lonval (Michelle Pfeiffer) has the mission to teach the art of love to Chéri (Rupert Friend), the son of Madame Peloux (Kathy Bates), but what begins as a naughty flirtation, becomes a passionate love of six years. A romance that will be crossed by Madame Peloux's plans for her son: to marry Edmée (Felicity Jones).