Giulio Cesaroni and Lucia Cudicini, he a widower, she separated, meet again after twenty years in Rome. They realize they still love each other and decide to get married, so Lucia's daughters, Eva and Alice, arrive from Milan and move in with the Cesaronis. Getting to know Marco, Rudi and Mimmo, Giulio's sons, is not easy and things are also complicated by uncle Cesare, Giulio's brother, and his jealousy.

Marco learns that Eva is going to London for a weekend and would like to accompany her, so he tries to scrape together the necessary money and his uncle Cesare finds him a job as a liscio player with a small orchestra of over-sixty year olds in a club. Meanwhile, Ezio, because of a prank by Giulio and his brother, argues with Stefania and leaves home.

There is tension in the Cesaroni household. Lucia is so busy with work and household chores that Giulio hasn't been able to have a moment of intimacy with her for several days. Meanwhile, Marco has a fight with Lucia, guilty of having taken the guitar from the closet that reminds the boy of his deceased mother. However, things smooth out and Marco starts playing again.

After a meeting with the school psychologist, Giulio tries to imitate Lucia in his relationship with his children, who are worried about their father's change. Meanwhile, Lucia feels lost when Eva confides in her that she intends to make love for the first time with her boyfriend and has a tough fight with her daughter.

After years of absence, Augusto Cesaroni, Giulio and Cesare's brother, leaves the United States and returns to Rome. Giulio, who has always believed Augusto to be a rich and powerful former race car driver, has to change his mind. The man, full of debts, has actually shown up only to claim his share of the liquor store. Meanwhile, Rudi blackmails Alice because of his stepsister's affair with a boy.

Giulio discovers that years before his father, to indulge his passion for engines, had left him a mechanical workshop, which was then sold, without his knowledge, by Cesare to pay off the debts of the liquor store.

While Augusto, out of the hospital, starts a relationship with Gabriella, Eva returns from Milan with her friend Beatrice. Giulio, hoping that Marco will fall in love with her and forget his stepsister, convinces his son to organize a party. Marco, however, disappoints his father's expectations. Meanwhile, Lucia, due to the return of Professor Zuppante, has to leave school.

Alice hangs out with a bully named Riccardo who, in order to be accepted by Giulio, tries to appear serious and studious. When the innkeeper, with Rudi's help, discovers the boy's true nature, he reserves his most classic punishment for him: the broom. Meanwhile, Marco, while still being troubled by his feelings for Eva, lets himself be seduced by Rachele, the new teacher.

Lucia plans a group vacation at a campsite in Sardinia, but friends and relatives have other plans and one by one they back out, so Giulio and Lucia are forced to leave alone. Eva, convinced by Giulio to forget Marco, for the good of the family, follows Veronica to Croatia, while Marco and Walter leave for Greece.

Lucia discovers Sergio's deception and Giulio, having escaped danger, immerses himself once again in the preparations: he wants his wedding party to be unforgettable for the entire neighborhood. Unfortunately, finances are languishing and Giulio finds himself entangled with a financial company and forced to lie to Lucia. The latter, having discovered her future husband's lies, decides to punish him to teach him a lesson.

On the advice of the doctor, who fears a new trauma, the Cesaronis indulge the amnesiac Francesco who believes himself to be Giulio. The man usurps the innkeeper's place at home, in the wine shop and also next to Lucia.

Don Gervasio, the president of the Romulana, the neighborhood soccer team, dies suddenly, so Cesare and Andrea run for the succession. The innkeeper, thanks to Ezio's help, becomes the new president but, for the good of the team, gives up his place to the wealthier rival. The latter, after another attempt to seduce Lucia, receives Giulio's violent congratulations.

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Giulio, in an excess of romanticism, leads Lucia to the place where twenty years before he had made love to her for the first time, but unfortunately he gets the wrong place. Lucia, with a deadly pressure, manages to make Giulio confess: the other, the accused girl, was Stefania, now Ezio's wife. Lucia punishes her friend by wrecking her car.

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Giulio, Cesare and Ezio are about to leave for the traditional fishing trip when Sergio, seriously ill, shows up again. The three, suspicious of the sudden arrival of Lucia's ex, kidnap him and take him with them to Abruzzo. Upon returning to Rome, his illness revealed, the man says goodbye to his family and leaves for treatment in the United States, accompanied by Lucia, encouraged by Giulio.

Gabriella, upset by Augusto's abandonment, shows up at the Cesaroni house accompanied by a fortune teller, who instills in Ezio the doubt that Walter is not really his son. After undergoing a medical test, which shows he is sterile, the mechanic is convinced that the father of his son is Giulio. Luckily, Stefania manages to clarify the matter.

Little secrets torment the Cesaronis. Lucia throws a water bomb that hits Stefania and makes her miss the meeting of her life with a famous writer, while Giulio and Ezio believe that Cesare hides his gambling addiction from them.

Marco and Giulio have a tough fight over the young man's decision to become a musician. Meanwhile, Lucia receives a beautiful necklace as a gift from an anonymous admirer. The woman thinks that the gift was given to Giulio and when she discovers that the necklace actually came from her admirer Andrea, she flies into a rage.

Marco seems increasingly strange and it is now clear to everyone that he is in love. However, no one suspects that the lucky girl is Eva. Meanwhile, Sergio shows up at the Cesaroni house and, on the verge of being named Cavaliere del Lavoro by the President of the Republic, he would like to take advantage of the opportunity to embarrass Giulio and win Lucia back.

Ezio and Stefania argue furiously and involve Giulio and Lucia in their delusions. Meanwhile Marco wins a music competition but is sad because he would like to confess his love to Eva and to complicate matters there is also Cristian, the girl's ex who resurfaces after a long time, and Giulio, who, not understanding the young man's feelings, urges him to forget his stepsister.

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Sergio wants Lucia to get back together with him, but after her ex refuses, the ruthless manager goes to Giulio's liquor store and threatens to take away his future wife, daughters and job. Giulio acts on impulse and doesn't hesitate to punch him, so Sergio, with the complicity of a doctor friend, makes the Cesaronis believe he is dying.

Rudi takes part in a psychological test and the result, to everyone's surprise, is that the boy is a genius. Giulio, enthusiastic, does everything to satisfy his son's needs and stimulate his intelligence. Alice, suspicious, discovers that the Leonardo da Vinci of Garbatella copied the answers. Lucia convinces Rudi to confess and the father's punishment is not long in coming.

The end of the holidays seems to bring some news to the Cesaroni household: Lucia, suffering from strange ailments, fears she is pregnant and tries to talk to Giulio who, misunderstanding, believes that Stefania is expecting a child. Marco, meanwhile, has resumed his relationship with Rachele.