Lucia has remained in Rome to organize an exhibition of young emerging painters, and Ezio, convinced that she wants to win Giulio back, hatches a plan to bring the two back together. When the innkeeper convinces himself he's got a second chance with his ex-wife, the truth hits him like a cold shower. Rudi returns from vacation convinced he's forgotten Miriam, and Alice is filled with hope that his feelings will be reciprocated.
Ezio and Cesare, certain they're in contact with aliens, become convinced the world is about to end and decide to steal a submarine to save themselves from the Great Flood. For Giulio, however, the most important thing is to make a good impression on Lucia. While Alice and Rudi grow increasingly cold, Diego meets Miriam, and they immediately fall in love.
Giulio, Cesare, and Ezio clash with Stefania and Lucia over the assignment of the former Barilon store, where the men want to open a Roma Club and the women a bookstore. In a clash where the ends justify the means, Giulio, seeing the bookstore as a reason for Lucia to stay in Rome, boycotts his friends.
Ezio decides to buy an old Alfa Romeo Arna, so he convinces Cesare and Giulio to take a trip to Sicily to pick up the car. Fueled by Cesare's prejudices against the island, the three become convinced they're staying with a mafia family. Meanwhile, Lucia is forced to confront her jealousy: seeing Giulio in a costume on the front page of a neighborhood calendar is quite disturbing to her.
Cesare is convinced that Flaminio Maphia plagiarized a rap song he composed in his youth with Giulio and Ezio and their group, "The Gladiators." To prove to everyone that the current hit, "Rome by Night," is his creation, he decides to reunite the band. Giulio and Ezio, however, are too rusty to play, and Cesare decides to fend for himself.
Giulio receives a court summons for separation and decides it's time to forget Lucia. Fate, however, intervenes, and the two reunite in Maremma to help Ezio. Maya, listening to the song Marco wrote for Nathalie, discovers a new facet of love.
Giulio receives a visit from Ricky, a former boxer he fought twenty years earlier. He wants to arrange a friendly match, but it quickly turns into a fight to the death. Meanwhile, Lucia tries to tell Fabrizio she still loves Giulio, but it proves more difficult than expected. Elena, recently returned to Rome, puts a strain on Alice and Francesco's relationship.
Cesare tells Mimmo that he has to write an essay on the origin of the surname of the mythical Cesaroni family, which dates back to the Roman Empire, where Cesare's ancestor ran a tavern, and Giulio's ancestor was a brave soldier.
Cesare tells Mimmo that he has to write an essay on the origin of the surname of the mythical Cesaroni family, which dates back to the Roman Empire, where Cesare's ancestor ran a tavern, and Giulio's ancestor was a brave soldier.
In Garbatella, Blind People's Day is being celebrated, and Sonsei, having become blind out of necessity, frames the Cesaronis by cheating them as usual. Meanwhile, Marco, with Francesco's help, decides to force fate for once and declare his love to Maya. Meanwhile, Mimmo decides to pose as Justin Bieber to help Belinda and thus teach Matilde a lesson.
Giulio and Cesare, lured by a large sum of money, decide to sell the liquor store to the Chinese. But retirement life isn't as fun as they thought. After a night of passion, Rudi avoids Alice, unsure of his feelings, and she suffers, giving in more and more to Francesco's attentions.
During an away match between Roma and Palermo, Salvatore dreams that Giulio will die and convinces Cesare to do everything he can to prevent the tragedy. The dream turns out to be incredibly true, but, fortunately, not everything goes as planned.
With Giulio and Lucia away, Cesare and Ezio must take care of Mimmo. However, the boy falls into the clutches of Son Sei, a repurposed host on a local TV station that distributes lottery numbers. Maya discovers that her parents have cut off her finances and, to support herself, finds a job as a wedding photographer's assistant.
Lucia and Stefania host a famous chef at their bookstore. He hosts a TV show where the husband and wife cook, and they always end up arguing. This is exactly what happens to Lucia and Giulio when they decide to challenge each other to see who is the best cook. The outcome of the challenge will have amusing and unpredictable consequences.
Stefania and Lucia discover that Giulio and Ezio are chauvinistic and backward toward love between women and decide to take revenge. The prank spirals out of control. A trip to the beach before all their friends' high school exams brings Alice and Rudi closer, but Francesco's arrival throws everything into disarray.
Ezio learns from the newspapers that the Captain who married him and Stefania years earlier on a boat was actually a con man. The marriage is invalid, and Ezio wants to exploit his new single status, but all he does is ruin his relationship with Stefania. Giulio and Lucia try to mend fences. Francesco asks Alice to move in together, and she accepts.