Pazzi conspiracy
The opera is set in Renaissance Italy and concerns intrigues centering on the Medici family, and the Pazzi conspiracy. Giuliano de' Medici loves Simonetta Cattanei, who tries to warn him of the conspiracy against his family. But she is killed by Montesecco, a murderer hired by Pope Sixtus V. Giuliano is killed by the conspirators, but Lorenzo de' Medici escapes with the help of the poet Poliziano. He then wins the support of the people, who lynch the conspirators.