Argument: The conversion of Thais by the hermit Paphnutius. Obedient to a vision, he leaves the desert, and, disguised as a lover, seeks out Thais in Alexandria. She is moved to repent by his exhortations and, renouncing her evil life, consents to be enclosed in a narrow cell, where she does penance for three years. Paphnutius learns from a vision granted to Anthony's disciple Paul that her humility has won her a place among the blessed in Paradise. He brings her out of her cell and stays by her side until her soul has left her body.