The fourth century ascetic Paphnuce, journeys from his remote desert hermitage to urban Alexandria determined to locate the stunningly beautiful and libertine actress, Thais. He earnestly desires that she convert to Christianity. Gaining an audience by deception, the hermit passionately speaks to the actress of eternity. Remarkably, Thais repents and retires to a convent for the rest of her days. The hermit however, cannot rid his mind of her charms, not even with the help of the most severe austerities. After years of anguish the monk learns of Thais' immanent demise and hastens to her side. There he confesses the unspeakable.