The film covers a hundred years in the lives of the Ricordi family, the Milan publishing house of the title, and the various composers and other historic personalities, whose careers intersected with the growth of the Ricordi house. It beautifully draws the parallel between the great music of the composers, the historic and social upheavals of their times, as well as the "smaller stories" of the successive generations of Ricordi.

A film adaptation of Gaetano Donizetti's famous opera from 1835. Lucia is forced by her brother to marry for political reasons. Her fiancé reacts very badly and curses her. Lucia goes mad and her fiancé kills himself.