La rosa antigua. After a married parishioner confess she is in love with another man she is found dead. Don Matteo investigates. Natalina is angry because Don Matteo is receiving love letters and tries to find out who writes them.
Don Matteo is asked for help - unfaithful wife Annalisa wants to save her marriage. Soon after this conversation she is found dead and her husband becomes the main suspect. Don Matteo finds out that someone was watching the victim...