When Marioni gets home, he finds Irene waiting for him in her car. She knows Giacomo had shown up at school. The next morning, there is a rehearsal of the orchestra, followed by the Mozart sonata for two pianos, played by Barbara and Domenico.

After the meeting with the psychologist, Matteo meets up with his uncle, who invites him out for un aperitivo (a drink). At the pub, Matteo teases his uncle because the waiter happens to be an ex-boyfriend of his.

Marioni manages to reach Giacomo to tell him that he's sorry for how things turned out but also to encourage him to move on with his life. Matteo goes to talk to the new psychologist but puts up his defenses by saying that he doesn't talk much.

After Marioni assigns the orchestra parts to play with the guest conductor, there are some moments of tension between Matteo and Nathan. As a few students gather outside the conservatory, they see Giacomo, an ex-student.

The conservatory orchestra learns that the world-famous conductor, Ruggero Fiore, will be coming in just a few days to work with them and even give a public performance. With little time to prepare, Marioni asks for total commitment.

The kids continue to practice their instruments and go to lessons, but there's no shortage of love dramas and first kisses. Sara is dealing with her ex who just won't accept the breakup. And as before, she leans on Matteo.

Marioni realizes that the boys haven't practiced as they claim, so the teacher talks to Domenico who admits that they did indeed meet, but didn't play. Nathan's parents complain that Matteo's arrival is slowing down their studies.

The kids get together to practice all together as instructed by Marioni. However, when they start talking about themselves, they lose the desire to play and change their plans.

While Barbara's mother wants to make sure her daughter has overcome the difficult move, Matteo sings a song about feeling inadequate. Meanwhile, Marioni unexpectedly meets Irene.

While Chiara and Robbo explore their secret place, the father returns and suggests that they cook together. Clelia and Roberto hope to obtain permanent custody of Rosario, and Barbara's mother is happy with her daughter's results and wants to reward her.

Barbara is reprimanded because she appears tense and seems to never have fun. She maintains that she's not there to have fun and that in any case, she manages to do everything. Robbo and Chiara are at home since they're not feeling too well.

While Barbara is recommended a book about music that she might like, Matteo is encouraged to not follow the rules and keep laughing.

After the heated confrontation with Marioni, Matteo runs away and goes to the director who shows understanding and suggests that the boy no longer be part of the orchestra. Matteo says he will manage and find another way to vent.

Maestro Marioni asks Matteo what he wants to do with his life in music and is not satisfied with the answer he receives. The teacher, with his passionate tone, urges Matteo and encourages him not only to try but to do something more.

Sara is about to accompany Matteo on a tour of the facility when they run into Gigi, who asks for explanations about the girl's behavior. While they continue the tour, Marioni calls Matteo for an early violin lesson.