On a dreary, rainy day, Graziano Torri calls the police; his wife, Alessandra, who has just told him that she is pregnant, is missing. When Valeria arrives at the woman's home she finds a mysterious and recently dug hole…

The body of a twenty-two-year-old women is found on the banks of the Po. Her name was Stefania and she worked in a nearby Benedictine monastery. Without overlooking the obvious trail that leads to the halls of the monastery, Valeria questions Stefania's lover, Michele.