Catania, 1960s. At the beach resort run by the charming Rozzo Finocchiaro, Stefano, a blind elderly man, observes and comments with ironic and acerbic commentary on the behavior of the people who frequent the beach and whose lives are intertwined. Passing under his scrutiny are the industrialist Alfredo Condorelli—married to the wealthy Maria Rita and engaged in a clandestine affair with his secretary Rosalba—the stifling Rosa—wife of the former playboy Alfredo—the four bigwigs Roberto, Michele, Armando, and Rocco; the musician Gregorio Alacci; the fallen boss Jano Suarez; the Lanzafame family; and Peppino Di Paternò—a fifty-year-old married to the statuesque Ulla.

January 6, 1980. President of the Sicily Piersanti Mattarella is going to Mass with his family when a young man approaches his car and shoots him in cold blood, killing him. The young Deputy Prosecutor on duty that day is Pietro Grasso, future General Anti-Mafia Prosecutor and President of the Italian Senate. His investigations are continued by Giovanni Falcone, who uncovers dangerous connections between the Mafia, the ruling Christian Democratic Party, neo-fascist terrorists, and secret services.