 Riccardo, governor of Boston at the end of the 17th century, falls in love with Amelia, wife of Renato, his secretary and intimate friend. Amelia returns Riccardo s love, but is discovered by her husband. At a masked ball Renato kills Riccardo, who, as he lies dying, declares Amelia s innocence and forgives Renato. An opera in 3 acts.