A young man is departing by train and says goodbye to his two parents in different ways. In another scene, a little girl is going to school very reluctantly and her brother has to practically drag her there.

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?

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

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.

Camilla and Renzo go down to the morgue to identify the dead body. They take with them the earring Renzo found in the stairwell near Mattioli's office. Back home in bed, they discuss some peculiarities regarding the earrings and the corpse.

It's time for an official introduction to Camilla's mother's fiance. Everyone is a bit tense. Camilla then gets a phone call that changes the course of the evening.

Mattioli's wife talks to Berardi and tells him what she knows so that they can find the body of the nurse. At school, Camilla's class discusses the book "L'Esclusa" by Pirandello. The usual translation of the title is "The Outcast," but literally, it is "the excluded woman."

The case has been solved, one gets the feeling that if the murderer had been Varricchio, a common ex-convict, instead of a promising biologist, son of a prominent professor, the outcome would have been more palatable to the city and to the press.

The police question the man they caught fleeing the martial arts center and are able to tie up a lot of loose ends. Gaetano and Sonia discuss the case over dinner, but the inspector's mind is elsewhere. Renzo is finally convinced that Camilla wasn't having hallucinations when she saw the nurse's body upstairs.

Lojacono is confident he knows how the murder happened and is able to trick Renato into saying something he couldn't have heard on the news.

Berardi and his men go after Marino Monti who is at the martial arts center. It was very upsetting for Camilla to see it all so close up. She has a drink with Gaetano to calm down.

Lojacono and Di Nardo go to see Biagio's ex-girlfriend to ask her one more question. She happens to remember something that gives them a new lead. They then go and talk to Renato, Biagio's friend and colleague.

Having read about Mattioli's death, Camilla rushes to Berardi's office, where he is checking some documents with Torre. She participates and comes across an interesting piece of information.

Laura and Lojacono go to Laura's house and she begins cooking dinner. At his hotel, Aragona has a chance to see Irene, the new housemaid, in the dining room and can't take his eyes off her. Francesco brings Giorgia breakfast in bed. It's una graffa (a kind of doughnut).

Renzo comes home late after a meeting and finds Camilla on the couch deep in thought. She lets him know she has been connecting the dots between the postcard and the merengue instructor. She goes off to bed but finds a surprise on the way.