Arsinoé, in trying to win his affections, shows him a love letter Célimène wrote to another suitor. He discovers that Célimène has been leading him on. She has written identical love letters to numerous suitors (including to Oronte) and broken her vow to favor him above all others. He gives her an ultimatum: he will forgive her and marry her if she runs away with him to exile. Célimène refuses, believing herself too young and beautiful to leave society and all her suitors behind. Philinte, for his part, becomes betrothed to Éliante. Alceste then decides to exile himself from society, and the play ends with Philinte and Éliante running off to convince him to return.