La figlia di Iorio

La figlia di Iorio ("The Daughter of Iorio"), sometimes written as La figlia di Jorio, is an opera in three acts by Alberto Franchetti to a libretto by Gabriele D'Annunzio. The libretto is a very close rendering of D'Annunzio's play of the same name. "La figlia di Iorio" premiered at La Scala on 29 March 1906, conducted by Leopoldo Mugnone. Although the play, which had premiered two years earlier, was considered one of D'Annunzio's greatest works, the opera did not achieve a comparable success and has been rarely performed since its day. 
Synopsis.
The story is set in the small town in Abruzzo: Lama dei Peligni. Near the Grotta del Cavallone, lives a wealthy family in decline: the Sangro of Roio del Sangro. The father Lazaro di Roio is happy because his young son Aligi is getting married with a rich woman of the country. However the wedding is interrupted by the inhabitants of Lama, enraged against a girl. The girl named Mila is accused by the superstitions of the people of being a witch, and so is likely to be sentenced to death. Aligi chases people away, because he is in love with her. So the young man breaks the marriage and Lazaro curses him away. Aligi and Mila go to live in exile in the Cave, hated by all the people, and plan to leave the country. Aligi but is too poor and so he travels to Rome to appeal to the pope. When he returns confident, Aligi discovers that the inhabitants of Lama Peligni burned alive Mila during his absence.