A group of school kids visits a museum of trains. Pisanelli, after being discharged from the hospital, goes to the pharmacy to get the medicine prescribed by the doctor.

The atmosphere at the police station is gloomy as the end of the year approaches and the closure of Pizzofalcone is imminent. Lojacono and Di Nardo are out investigating a theft case in an apartment.

Lojacono and Di Nardo gather information from the couple who were robbed. When they leave the apartment, they agree that there are some strange things. At the police station, Aragona goes to talk to Romano.

The police station receives a phone call about the disappearance of a child during a school trip with the nuns. Aragona and Romano rush to the museum, the last place he had been seen, where they question the sisters and a little boy.

At the police station, the team discusses how the museum's cameras were positioned. Back at the museum, they try to calm the child's mother, who is very upset.

Giuseppe is shaken by the case he is working on, concerning the child who disappeared at the museum. He has lost his appetite and confides in Letizia. At the police station, the team is looking at the security camera footage for some clues.

Dodo's mother and her new partner try to identify the hooded person the boy walked off with. The boy's father is also questioned.