Leporello, servant to Don Giovanni, keeps watch as Don Giovanni’s latest love conquest goes wrong. Don Giovanni attempts to flee from Donna Anna, who is determined to unmask him. Her father, the Commendatore, arrives, and Don Giovanni kills him in a duel. Giovanni and Leporello flee. Donna Anna forces her fiancé, Don Ottavio, to vow revenge.
The next morning, Don Giovanni and Leporello encounter Donna Elvira, who laments that her lover has left her. (Her lover, of course, is none other than Don Giovanni.) Leporello tries to smooth things over, but Donna Elvira, too, vows revenge.
Next, Don Giovanni and Leporello crash the wedding of Zerlina and Masetto. Don Giovanni invites everyone to his home for a party and tries to seduce Zerlina. But Donna Elvira whisks her away. Elvira also warns Donna Anna and Don Ottavio not to trust Don Giovanni, and Anna recognizes him as the masked stranger who killed her father. But Ottavio is not yet ready to take revenge.
At Don Giovanni’s party, he dances with Zerlina and tries to drag her into another room. Don Ottavio, Donna Anna, and Donna Elvira confront Don Giovanni, but he escapes.
Don Giovanni forces Leporello to switch clothes with him and takes advantage of the disguise to avoid those hunting him. He also woos Donna Elvira’s maid, assaults Masetto, and gets Leporello in trouble.
In a cemetery, Giovanni and Leporello encounter a statue of the Commendatore. The statue speaks, reproaching Don Giovanni. Undaunted, Don Giovanni invites the statue to dinner.
Don Ottavio, having taken steps to apprehend the murderer of his fiancée’s father, begs Donna Anna to marry him immediately. But she calls off their engagement.
At Don Giovanni’s house that night, Donna Elvira makes a last ditch attempt to get Giovanni to change his ways. Not an option. The statue arrives for dinner and orders Giovanni to repent or face damnation. When Don Giovanni refuses, he goes straight to hell.