Lucia stayed in Rome to organize an exhibition of young emerging painters. Rudi returns from vacation convinced he's forgotten Miriam.

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 finds himself dealing with a young suitor who, because of Ezio and Cesare's intervention, threatens to report him in revenge for being rejected. Lucia's intervention brings the girl to her senses, and Giulio, happy at his newfound connection with his ex-wife, can only be stunned when she announces she's about to return to Venice.

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. Cesare discovers he has a son, the result of a sperm donation he made in his youth. However, things aren't as they seem, and this time, Cesare's enthusiasm will suffer the consequences. To finance their fashion project, Alice and Jolanda decide to find work as waiters, which is how they meet Francesco.

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. Ezio, Giulio, and Cesare decide to kidnap Lucia so that Giulio can prove his courage by saving her and at the same time cast a bad light on Fabrizio, Lucia's boyfriend. The mechanic's plan, however, goes awry, and the three end up in a world of trouble. Alice and Jolanda, despite initial difficulties, receive an order for their clothing.

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. Mimmo seeks comfort in prayer to ease the pain of love, but Ezio is convinced that the boy's destiny is to become a saint. Francesco, Jolanda, Rudi, and the others organize a surprise party for Alice's eighteenth birthday, but she ruins her friends' plans by leaving for Milan.

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. Ezio is accused of stealing money from Barilon's garage, and Diego is the only one willing to help the mechanic prove his innocence. Lucia and Alice move back into the Cesaroni household, just in time to celebrate Christmas together. Mimmo, however, insists on going to Sicily to see Andy. Meanwhile, Maya receives an unexpected visit from Jay, her boyfriend.

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.

To resolve a dispute over Giulio's house, the trio decides to travel to Milan to meet their cousin Flavio Cesaroni. Ezio and Cesare, convinced that Flavio is a financial genius, allow themselves to be drawn into a large investment, mortgaging Giulio's house.

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. Cesare and Ezio find themselves at loggerheads over Walterino, the Masettis' hamster. To resolve the matter, the two friends are forced to turn to the Forum court. Marco and Maya are finally together and can enjoy their romantic idyll, even though Maya knows she'll have to tell Marco the truth sooner or later.

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. Stefania receives explosive news: a well-known director is interested in making a film of her erotic novel. He asks Lucia to pose as his agent. The two women thus meet none other than Rocco Siffredi. Giulio is jealous, but rather than admit it, he unleashes a series of events that could destroy his newly formed union with his wife.

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. The Grand Dukes use every devious means to pressure Marco and his family and force the Cesaroni family out of Maya's life. They organize a gala dinner where all sorts of bizarre events occur, but true love is hard to defeat.

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, takes a job as a wedding photographer's assistant. It's Barilon's birthday, and Ezio decides to give him an ancient Egyptian ornament depicting a black cat. When the mechanic discovers that the figurine brings good luck, he convinces Cesare and Giulio to help him steal it, triggering a curse that affects everyone. But things are not as they seem. Diego's sister Lisa unexpectedly arrives in town.

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. To help Lisa repay her debt, Rudi and Diego organize a clandestine gambling den in the wine shop, taking advantage of Giulio's absence and without Cesare's knowledge. Ezio covers for them by making Cesare and Salvatore believe he is an alcoholic. But the misunderstanding is destined to fail, and the truth comes out. Diego, however, manages to get back into Stefania's good graces and is welcomed back into the house.

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. With Pamela away, Cesare allows himself to be seduced by Carla, Blinda's mother, who tries to win him over. Pamela kicks him out of the house. Cesare then shows up at Carla's house with Giulio and Ezio with a plan that should put everything right. Eva's arrival makes coexistence at the Cesaroni house with Marco and Maya increasingly difficult, sparking a fight between the two lovers.

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. Thirty years have passed since the death of his father, Romolo, and to commemorate him, Cesare has decided to move his body to a new chapel. But the coffin has disappeared. Giulio and Augusto try to hide from him the fact that his father had a lover and that he wished to be buried next to her, but the truth comes out.

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