Una operación rutinaria. A routine appendectomy ends with a girl in coma. The anesthesiologist is found dead and girl's father accused of murder.Don Matteo decides further investigate. Introducing nonna Elide and grandson Nerino characters
A doctor is found dead and suspicion falls on the father of one of his patients, who fell into a coma after a minor operation. Don Matteo investigates and finds strange drugs in the hospital.