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.

Camilla and Gaetano meet again after two years at the place where a girl was found dead. The way they handle things, it seems like not a day has passed. Renzo returns home and finds Andreina searching for something.

Gaetano receives a phone call and when it ends, he finds himself forced to tell Camilla that it's from a journalist he met in Prague. Back at school, Camilla wants to know more about the centurion, while Renzo is dealing with a tragedy.

Berardi is gathering information about the victim who was found when Camilla was taking the kids on a field trip. While trying to understand something, Ferrari reports the disappearance of a girl. Meanwhile, Camilla's house is 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 he doesn't want to. With Camilla's arrival, the argument calms down, but the teacher would like to understand 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 for the competition when he receives a proposal.

Renzo is at home with Livietta and he is helping her with a project for school. Camilla goes to help Gaetano with the recognition of the centurion, but she will also need Gaetano's help later.

In the car, Camilla and Gaetano talk about commitment in relationships and marriages. When they arrive at Camilla's house, they unload the water heater together, when Renzo sees them.

Renzo tries to convince Camilla that he's not jealous, but she maintains that he's just stressed about the competition. At school, the girls who had received the photos before they were deleted show some details of the centurions to the teacher.

Camilla gives Gigi a ride and asks him what his brother has to do with Holly's murder. Gaetano meets with Meg and shows her the photo of the boy who had lunch with her sister on the day of the accident.

Torre and Gaetano leave Hotel Bisanzio to go towards the Teatro Marcello near the restaurant where the American woman was seen with the man from the identikit sketch. Meanwhile, Camilla tries to talk to Renato with Gigi's help.

Berardi and Torre find the centurion who likes mortadella and they manage to pry some information out of him. Upon arriving at the address they obtained from him, they are presented with a little surprise.

While Gaetano, Torre, and Camilla are in the apartment with Gigi and Renato, their grandmother returns and is frightened upon seeing the police. Chaos ensues. Back home, Livietta has another pet proposal for her father, who is trying to multitask.

The news of the American tourist's murder is broadcast on television when Camilla returns home and finds Renzo very agitated about his project, which, according to him, is missing something.