The story of Marshal Rocca dei carabinieri who operates in Viterbo, takes place on two levels: on the one hand, each episode is a case in itself and Rocca finds himself having to solve the most disparate cases, often in conflict with the power of attorney; on the other, her private story as a widower with three grown children with all their problems is added, together with her sentimental one with the pharmacist Margherita, separated from her husband who knows ups and downs.