For Anna and Marco, a young couple, it was supposed to be a restful holiday, a break from studying for their university courses, in the peaceful Lombardy countryside. But too many strange things happen in the nearby Abbey of Morimondo. What mystery is hidden in those age-old walls? Who is sneaking around the Abbey? Will Ann and Marco manage to resolve the case and remove all doubts?

A murder in Piazza del Campo runs the risk of ruining the joyful atmosphere of the Palio di Siena. Is the murderer really a member of the Sienese nobility, as the clues would lead us to believe? It will be the investigations of a enterprising journalist, visiting Siena to write an article on the Palio, who uncovers the identity of the assassin just in time.