A woman is found dying. Her daughter, Chiara, says she knows who it was: Don Matteo, her father! The accusation is doubly shocking. While Anna and the Marshal fight to prove his innocence, the priest closes himself in silence. Meanwhile, Nino has to keep at bay Sister Luciana, a missionary aunt, who has not seen her nephew for years and who, because of a "little lie", is convinced that her nephew is a priest.