During the performance of the Cavalleria Rusticana, Michael and Vincent have numerous people killed. Al Neri shoots Archbishop Gilday, two assassins suffocate and then hang Fred Keinszig and Calo manages to stab Don Lucchesi in the throat with his glasses before being shot dead by his bodyguard. Don Altobello eats the poisoned cannoli Connie gave him and slowly passes away.
After the performance, Mary tries to talk to Vincent but he shuns her again. She then turns to Michael and angrily confronts him about Vincent while the family exits the theatre.
Mosca (Altobello's assassin) shoots twice at Michael on the theatre's steps, but he only wounds him. He's then shot dead by Vincent. Mary has taken one of Mosca's bullets and can only say 'Dad...' before collapsing at her father's feet.
As Kay cries out at her daughter's demise, Michael clutches to her dead body, then rolls on his back, head in hands, before letting out a mostly-silenced yell of agony and despair, while Vincent and Connie watch helplessly in grief.
The scene shifts to flashbacks of Michael waltzing with Mary, then with Apollonia and finally with Kay, before showing Michael as an old and lonely man, sitting on a chair in the courtyard of Don Tommasino's villa. He falls limp, dropping an orange, collapses face down on the ground and passes away.