Both Camilla and Gaetano, for different reasons, arrived at a similar conclusion about the earring. Piccolo and Ferrari have a job to do, but they also do some personal talking.

Mattioli's widow recounts the story, told through her eyes, of the murder, including what she heard in the stairwell of the building.

The case has been solved and it's the last day of school for Camilla and her students. Who will flunk and who will be promoted?

Torre is cooking in the archives! Berardi shows up and they talk. Later, Berardi meets up with Camilla to fill her in on the case.

Camilla and Gaetano still have some loose ends to tie up, but they are not thinking of the same loose ends. He finally manages to tell her he is leaving for a new job.

Gaetano is leaving, ready to board his plane, but he clearly wishes Camilla would show up. Meanwhile, it is Potti's birthday and celebrations are going on at home.

At home, there is the usual rush to get ready for school and work. Camilla is running late and is not available to answer a burning question her husband and daughter have for her.

Camilla and her class are on a field trip to the theater and she is trying to hand out the tickets, but lots is happening outside, involving the other teacher, an out-of-work actor, the students, some picture-taking, and some trouble down the street.

Berardi is back in the Rome office and there's a celebration. But since there's also a dead person at the Colosseum, the celebration comes to an abrupt end and Berardi and Torre rush to the scene of the crime. The class trip also comes to an abrupt end.

After two years, Camilla and Gaetano meet up again at the scene where a woman had been found dead. They fall into their usual habit of discussing the crime, as if not a day had passed.

Gaetano receives a phone call and when it ends, he finds himself obliged to tell Camilla that it was from a journalist he had met in Prague. Back at school, Camilla wants to know more about the centurion, while Renzo is dealing with a problem at his studio.

Berardi is gathering information about the victim. Ferrari identified a report about a missing American girl and Berardi goes to see her sister, who reported it. Meanwhile, Camilla's house has gotten flooded and Renzo is very angry.

While the investigations continue, Renzo has an unpleasant surprise that undermines his peace of mind as a husband, and even a competition he must participate in doesn't give him peace.

At school, Alex and Aiello are arguing because Aiello wants Alex to delete some photos from his phone, but Alex doesn't want to. With Camilla's arrival in class, the argument calms down, but the teacher would like to know why Aiello got so upset.

Gaetano asks Camilla for help in identifying the centurion who found the girl's body. At home, Renzo is working on the competition and has a surprising conversation with his colleagues.