The film, based on the novel "The Turn of the Screw" by Henry James, tells of mysterious incidents in a villa located on an island in the middle of a lake. Teresa is sent to the villa to educate Milo and Flora, two orphaned children entrusted to Elia, rude man. But upon her arrival, a bereavement upsets throughout her stay: the suicide of the former educator of the children, Eleonora Petri, whose body is found a few days later on the banks of the lake. From then on, Teresa will have strange dreams every night and assist in mysterious apparitions. The various events will bring Teresa to protect the two children and try to discover the mysteries and secrets surrounding the villa and involving all its guests.

Venice, 1755. Giacomo Casanova, just returned from exile in Vienna, threatens to kill hearts and create havoc in the city with his unparalleled charisma. Meanwhile, the Doge Francesco Loredan is in poor health and the Inquisitor Pietro Garzoni plots to influence in his favor the succession to the Dogado. In this regard, the latter intends to get rid of Casanova, because it could ruin his plans, and to the purpose he entrusts the evil Zago. While at Cantina do Mori, the Prince of Seductors meets an old flame: the beautiful Gretchen, who leads him to the palace of Countess Margarethe von Steinberg, for whom she works as a waitress. Here, Casanova meets the great lady and is challenged by her in a singular bet: if he succeeds in seducing the young Francesca Erizzo, daughter of one of the elders of the city, she - Margarethe - will be his for one night.

Twenty years in the life of "Il Califfo" Franco Califano, from the Rome of the Dolce Vita to the 1984 concert at the Teatro Parioli, through great musical successes, loves, falls, and comebacks.