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.

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.

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.

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.

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.