Leporello, the faithful servant of all of Don Giovanni’s follies, is a witness for a night scandal in the house of the Commendatore. Donna Anna alerts the whole household and tries to stop an intruder who would like to leave the house unseen. This intruder is Don Giovanni. The Commendatore hears the racket and comes to protect his daughter. Don Giovanni takes up the challenge. As a result the Commendatore is killed. Don Giovanni tries to run away.
Donna Anna and her bridegroom Don Ottavio cannot accept the sudden and horrible death of the Commendatore. Donna Anna wants to take revenge on the unknown murderer.
As Don Giovanni abandoned her, Donna Elvira is tortured with love and her craving for revenge. She finally finds him in the house of the Commendatore, but Donna Elvira’s grief only arouses indifference in Don Giovanni. He manages to escape. It is Leporello who answers in his stead.
Zerlina celebrates her engagement with Masetto. Don Giovanni cunningly tries to get rid of the fiance in order to stay alone with the young girl. He charms her and leaves her with all senses alert. Donna Elvira warns Zerlina that she should not trust Don Giovanni. Donna Anna and Don Ottavio hope that Don Giovanni will give them his support in the difficult moments they are living since the Commendatore has died. Don Giovanni gives them his faith. But Donna Elvira persuades Donna Anna not to believe in Don Giovanni’s sincerity. When Donna Anna remains alone with Don Ottavio, she tells him how the fatal night proceeded and confesses that the murderer of her father is Don Giovanni himself.
Everybody is invited to the party Don Giovanni organizes. Zerlina and Masetto come to this party. Donna Anna, Don Ottavio and Donna Elvira join them to denounce Don Giovanni as the murderer of the Commendatore guilty of all their misfortunes. But Don Giovanni manages to reverse the situation and to involve everybody in the partnership. But finally, all persons go out of the play accusing Don Giovanni.
Leporello does not want to share the follies and dangers of Don Giovanni’s life anymore, but the latter makes him take part in the realization of his new plans. According to one of these ideas, Donna Elvira, abandoned and unhappy, falls into the arms of Leporello whom she mistakes for Don Giovanni. Don Giovanni meets Masetto and his friends who want to sort out the man who has so much power over them. But Don Giovanni, whom they are forced to mistake for Leporello, manages to trick them and teaches Masetto a good lesson. Donna Elvira who continues to mistake Leporello for Don Giovanni meets Donna Anna and Don Ottavio by chance. Zerlina and Masetto join them. Mistaking Leporello for Don Giovanni, they all want to execute him on the spot. Leporello manages to escape. Everybody feels that they cannot get rid of the destructive power of Don Giovanni over their fates.
Don Giovanni hears the voice of the dead Commendatore accusing him in horrible sins. Don Giovanni in his answer provokes the Commendatore and dares invite him to dinner. Don Ottavio tries to persuade Donna Anna that they will soon find the way to punish the criminal, and that she should agree to marry him as soon as possible.
Don Giovanni organizes a bigger party, to which everybody can come, even the late Commendatore. Joy is in full swing when Don Giovanni sees the invited Commendatore come in. The latter asks the criminal to repent himself. Don Giovanni does not at all admit his fault and challenges all. But he is defeated and crushed. The avengers triumph...