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.

Alice and her friends know that something serious has happened to Joy, but their parents have only told them to be patient and that their friend will return soon.

During the concert rehearsals, Marioni believes that Barbara hasn't put in enough effort because she has dedicated time to studying philosophy. He therefore decides to exclude her and warns the others not to console her.

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.