Many of the town's citizens suffer from food poisoning. Police officers investigate and find out that the cause are poisoned apples sold by the Di Giacomos, a family of farmers. After some interrogations by Captain Anceschi, it seems that the family is not responsible for the case after all. Don Matteo's investigations lead him to a seasonal worker Di Giacomo's who seems to have motive.

The show’s own verdict is on its page.