The assassination of Sweden’s King Gustav III at a masked ball in 1792 provides the historical backdrop for one of Verdi’s most passionate and dramatic operas. A nobleman is humiliated when he finds reason to believe his wife is in an adulterous liaison with his best friend, the king. In his grief and anger, he joins conspirators who plot the king’s death. At the ball, the page is tricked into revealing the king’s disguise, which enables the wronged husband to strike the mortal blow. In his moving death scene, the King confesses his love for the woman, but vows that she remains chaste and magnanimously pardons his assassin as he dies.