Pietro is a revered teacher, Teresa his brilliant and precocious student. Their affair is both illicit and tempestuous. After one fight, Teresa suggests that each tell the other a secret, one so shameful or shocking that were it to be made public, it would destroy that person’s life. Time passes, Pietro’s stature as a writer grows and his family settles into the comfort of a bourgeois life. But he is haunted by the possibility that Teresa may one day reappear and tear apart his world with the secret she knows.
Naples, early 1980s. The strained marriage between Aldo and Vanda is fractured one evening when Aldo admits, unprompted, his infidelity. Equally hurt and bewildered, Vanda attempts to hide her pain from the couple's two school-age kids, lest they discover that their cramped apartment is not a home of trust and love. 30 years later, Aldo and Vanda are still tied together, but their relationship with each other and their children continues to be defined by what happened all those years ago.
Garage owner Angelo and big-time film producer Alberto find themselves occupying neighbouring beds in a Rome hospital after suffering heart attacks. Alberto is a gregarious joker - and chain smoker - who has a strong effect on the impressionable Angelo. However, as one of the men's condition deteriorates, the other becomes more deeply involved in his personal life.
Accio and Manrico are siblings from a working-class family in 1960s Italy: older Manrico is handsome, charismatic, and loved by all, while younger Accio is sulky, hot-headed, and treats life as a battleground — much to his parents' chagrin. After the former is drawn into left-wing politics, Accio joins the fascists out of spite, but his flimsy beliefs are put to test when he falls for Manrico's like-minded girlfriend.
During the 20 months before Italy's liberation from Fascism, a group of university students trade empty rhetoric for action by joining the Partisans into the mountains of Nazi-occupied northern Italy. There, group leader Gigi falls in love with his best friend's girl. As the Resistance struggle continues, some of the "little teachers" are killed, and the brutal reality of war leaves its mark on their youthful idealism.
Michele is a Communist MP who loses his memory in a car crash—although nobody seems to notice. Over the course of a water polo match ahead of election day, he begins to remember his past life, revealing the picture of a man whose personal and political identity crisis mirrors the one of Italian communism.
Creasy, a traumatized ex-CIA agent, gets a job as a bodyguard for Samantha, the twelve-year-old daughter of a wealthy Italian family living in a swanky villa on the shores of Lake Como.
Eccentric and full of manias, Michele is a young high school professor who defines himself as “not used to happiness”. He realizes his life is meaningless if he doesn’t have a woman by his side but, after a series of rather disastrous experiences, he feels more alone than ever. Then, out of the blue, a new French teacher called Bianca arrives at school. Amongst uncertainties and contradictions, the two start dating. In the meantime, a series of homicides take place and a police officer begins to suspect that Michele is involved. Bianca will save him providing an alibi at the right moment, but then, everything goes wrong again.