After her trip to the Tiber River, Camilla goes to pick up Livietta at Giulio's house, where the two kids are dancing to Merengue. Camilla has some questions about that. Meanwhile, Berardi and Torre are busy with the coroner, identifying a corpse.

Varricchio is back in the DA's office and tells a different story, admitting he had lied the first time. But is there proof of his new version? At home, Lojacono is shocked by some news he hears on the TV.

The mouse is still an issue at Camilla's house. At police headquarters, Berardi has his hands full with the mother of the murdered detective and Mattioli's wife.

Ottavia and Palma talk about his new apartment and the fact that it is still empty. Lojacono gets some good news from his friend Paolo and shares it with Marinella. He goes to the train station to wait for Laura and gets an idea about the case.

Camilla, in conversation with her mother, hopes that the postcard from New York is just a misunderstanding. Renzo has a moment of truth by a dumpster. Later, he says something about Dr. Mattioli that gives Camilla an idea about her "hallucinations."

Lojacono is not at all convinced that Varricchio killed his own children, especially after talking to him. Pisanelli got some bad news about another retiree having taken his own life. Pisanelli had been watching over the wrong home.

Camilla can't help herself and goes to the home of Mattioli's former nurse. Gaetano leaves Camilla a text message. Note that in Italy, texting while driving is now prohibited.

Lojacono follows Varricchio to his hotel to ask a few more questions, in private.

Camilla is still convinced there is a mouse in the house and Renzo humors her. At school, there is some tension, but Marchesi has some information for Camilla and her mood changes. Berardi also obtains, almost by accident, some intriguing information, that could be pertinent to the case.

Marinella is shocked to hear on the news that a father might have killed his own children and she calls her father for some reassurance. The team goes to the funeral of Grazia and Biagio, in order to observe the behaviors of the various suspects and witnesses.

The detective's mother is not able to provide any useful information to the police. Renzo finds a small object near the front entrance of their apartment building. He also gets a postcard from New York, causing not a little stress to Camilla.

At the police station the team discusses the case and then they disperse. Lojacono sets up a date with Laura, Palma goes to his new place, Pisanelli goes to spy on his friend the monk, and Ottavia is working late at home.

Imma is troubled, both by seeing Calogiuri again and finding a new dead body. She looks around the apartment and goes to see the seamstress who had found the body.

Camilla can't rest until she has reported her suspicions to Berardi, and goes down to the police station before school.

At police headquarters, Guida is settling in to work on his puzzles, but someone with a familiar face walks in.