Classes 3C and 3D have been feuding for years. To put an end to an untenable situation, the "historical leaders" of the two classes, repeaters since time immemorial, organize a boxing match. Class 3C is represented by Massimo (Renato Cestie'), a handsome and bold athlete; class 3D, however, pits him against a giant, a newcomer nicknamed Terminator. Thus, a typical "Rocky situation" unfolds, with Massimo undergoing intensive training to overcome a feat deemed impossible by all. Like a Stallone, against all odds, Massimo, despite being severely pounded by his massive opponent, manages to win.

Double the party, and double the setbacks, for the kids in Class 3C on Sharon's birthday. Invited by her partner to her parents' luxurious villa, they have to find a new home because their father is under the tax authorities' scrutiny when they arrive. The large group of guests, along with the buffet and the Zampettis' waiter, "move" en masse to Bruno's house, a more cramped space where dancing becomes a feat for contortionists. What's more, when it's time to dance, Bruno's parents and the tenants, who insist on holding a condominium meeting, enter the fray. Sharon thus experiences the most stressful birthday party of her life.

This year, as tradition dictates, the legendary football match between the 3rd C and 3rd F teams is being celebrated. It's a real derby, one that promises to be fierce and fierce, given the long-standing rivalry between the two classes. Our players are preparing diligently for the big match. Their coach is Ciro, Bruno's stationer, who certainly isn't the most reliable; their sponsor is, needless to say, the Zampetti salami company; and even a foreigner, Aziz, the sponsor's Somali waiter. The 3rd C team enters the derby as a clear underdog. But, as they say, the ball is in the air.

Carnival is in full swing. For the occasion, the principal has organized a party in the school gym, attended by teachers and parents. It's clear that the students in Class 3C have other plans for their Carnival. On the evening of Fat Thursday, each of them, unbeknownst to their classmates, goes in costume to a large Brazilian party, hosted by Aziz and Puccio at Villa Zampetti. When the host unexpectedly returns, the disappointed students, victims of numerous misunderstandings, will be forced to quickly transfer the festive atmosphere of the Rio Carnival to the Sacchi household.

There's war between the 3rd C and the 3rd F! Luckily, it's just a "soft" war with toy guns and tracer bullets, which leave only a red stain on the victims' uniforms. Nevertheless, General Chicco's soldiers take their little war very seriously. Boys and girls, mindful of so many war movies, transform themselves for the space of a weekend into tough guys, sharp strategists, and heroic kamikazes...plus one shirker: Bruno Sacchi.

The big moment has arrived. Our nine students from Class 3C are just one step away from the fateful finish line: their final exams. They all share a common feeling: fear, and are gripped by a sudden and frantic attachment to their studies. Sharing the anxiety and strain of those moments is an unusual private student: Commendatore Zampetti, forced by work to sit his final exams alongside the students from Class 3C.