In Ancona, Giovanni is a therapist, whose 17-year-old son Andrea is accused of stealing a rare Ammonoidea fossil from his school. Andrea is suspended and protests his innocence, but later confesses to his mother Paola he and his friend stole it as a prank, and intended to return it before it broke. Giovanni and Andrea make plans to go jogging together, but Giovanni is called to the distant home of a patient who is severely distressed about a possible cancer diagnosis. Instead, Andrea goes scuba diving with a friend and swims into an underwater cave, where he accidentally drowns. Giovanni, Paola and their daughter Irene are left to mourn. Giovanni investigates the diving equipment model and becomes suspicious that Andrea's was defective, but Paola reminds him the verdict was that it was functioning properly. Giovanni, once a distant observer of his patients' struggles, begins having difficulty analyzing them, particularly the one he went to see on the day Andrea died, against whom he shows signs of impatience and hostility.