There's a problem at school, and of course, our Prof (short for professore [professor, teacher], the affectionate, abbreviated term students use in addressing a teacher) has to investigate.

The protest at school continues, and there is tension among the teachers and the principal. At home, Renzo has a first encounter with the housekeeper. He finds her a bit odd.

Little Livia is in the backseat as her mom drives another teacher home. She listens, she opens her mouth when she shouldn't, she observes. She draws her conclusions and then bets on them with her mom.

Bettina has tea with Camilla and invites her to a gallery event. Camilla then gets a phone call that requires her attention and she rushes off.

Camilla really is a good friend to Vanda. Vanda, on the other hand, is a bit naive. They have a heart-to-heart talk.

Vanda has a hard time accepting what seems obvious to Camilla. Meanwhile she gets a reality check in the form of a phone call. She's lucky to have Camilla as a friend.

After conceding their little bet, Camilla involves her daughter in a "phony" phone call. There's an incident at Bettina's gallery, where Camilla has gone to pick up a book.

Bettina gives Camilla something fresh to put on and gets the book Camilla came for. Small talk between Gaetano and Camilla leads to some interesting hypotheses about the case he is working on.

The family budget has suffered because of the loan to Vanda. At school, we learn that Camilla knows little about the internet, while Vanda gets an unpleasant phone call during her class.

There is some trouble at home involving little Livietta and Gavina, the new cleaning lady. It has to do with the mother-in-law.

Camilla and Vanda go looking for Mazzeo at his aunt's house. Camilla has a hard time watching her friend play into the hands of the man she is in love with.

Gaetano is pretty sure Camilla knows more than she lets on, and gently gives her a warning. But she can't help herself, and travels once again to Mazzeo's aunt's house.

Kids have livelier imaginations than adults sometimes, and in fact, Livietta can see something in Mazzeo's aunt's drawing that Camilla totally misses.

Bettina and Gaetano are supposed to go to the movies together, but Camilla shows up and Gaetano chooses work over fun. At school, everyone is rejoicing at the news that Mazzeo is on leave of absence.

Gaetano's investigation takes him to the school where Camilla and Vanda teach. Camilla, taking her cue from something Gaetano brings up, can't help doing a bit of investigating on her own.

Renzo made dinner tonight, and thinks he's created an oasis of pleasure. Uh-oh — that reminds Eva of the business card she had found in Mazzeo's locker.

Camilla chooses the wrong moment to visit the Body Oasis. She also chose the wrong moment to leave the ad about the place on the sofa at home.

Camilla and Gaetano talk about the case. Upon going back home, Camilla meets up with her mother who is clearly worried about something.

There's some drama in the classroom, but Camilla puts her investigative skills to work to get things back on track. Vanda gets put to the test once again by Mazzeo.

Camilla keeps trying to figure things out on her own. But will she remember to pick up Livietta at ballet lessons?

Mazzeo is at large. The police go to the crime scene and find the weapon in a peculiar spot. Camilla tells Vanda what she knows.

The pearls have come back from the jewelers, but there are some details to sort out, and Renzo discusses the situation with Livietta.

The chief of police questions Lubia who is a bit overwhelmed by what had happened at the Bailù. Her testimony brings clarity. Camilla gets to school when a meeting is already underway.

By now the news about Mazzeo is in the newspapers and of course, his students see the headline. When a student reads the article in class, Camilla has a feeling something isn't adding up. Vanda calls the police.