We are back visiting nature's own wonders, this time up in the mountains, on Mont Blanc, to be precise, at an altitude of over 4000 meters.

Camilla gets caught at the school window by the new principal. Having seen what she saw, she tries again to get some information from her students. Meanwhile, Berardi and Torre search the apartment for clues, and Berardi talks to the doorkeeper of the apartment building.

Ugo and Nora seem to be having a harmonious moment but there is tension in the workplace, as Iside tries to get a wedding gown ready for delivery. A new client has shown up and is chatting with Ugo in the office. It's "renewable energy" week in Trieste.

Guido goes over and beyond the requirements for a housecall. Meanwhile, Cettina is bringing out the "good silver" again to impress the doctor from the big city.

Dafne's father prowls around the house at night with a flashlight. She doesn't get it. She likes running water, which he doesn't get. They are each trying to deal with their grief.

The Castle of Roccascalegna stands on a high, rocky bluff dominating the valley of Rio Secco in the province of Chieti. Breathtaking drone footage allows us a bird's eye view of this fascinating construction, begun by the Lombards as a watchtower.

At the police station, there seems to be a match for the murderer. In class, Camilla does the roll call and discovers Luca Foglietti is absent once again. She goes to the window to investigate.

In the end, Lorenzo and Maya's wedding was a success for everyone except Gisela. Back home, Ugo and Nora discuss the day without arguing too much, which is also a huge success.

Grandpa Libero is having a rough day with his family. Ciccio is zoned out playing video games. Alberto comes home talking about his exam, and Maria comes home without Annuccia.

Dafne is at a party with her friend Viola, and a guy asks her to dance.

The Great Cave of the Wind in Frasassi is a natural wonder, but it also bears witness to the passing of time. Speologists are still exploring it and discovering new wonders.

The witnesses questioned by Torre furnished some important information about the murder. Gaetano meets the new public prosecutor who is not what he expected. Renzo makes the acquaintance of Livietta's substitute ballet instructor.

Lorenzo wants to leave, but Nora and Ugo talk to him about love. Gisela is waiting for the police, who aren't showing up. Meanwhile, Maya has a surprise for everyone.

Grandpa Libero goes over to the university with Fausto, looking for Alberto. Maria doesn't show up at school to pick up Annuccia, and so Annuccia starts walking home by herself. Nowadays kids would never be allowed to leave school unattended.

Dafne takes her lunch break with her new co-worker Camilla and learns a little more about her. At the hairdresser, Dafne gets a phone call from Viola.