Leporello, the servant to Don Giovanni, bemoans his destiny. His master and Donna Anna emerges from the palace struggling, as she tries to identify the man who has attempted to seduce her. Her father, the Commandant, challenges the seducer to a duel... the Don kills him. Anna returns with her fiancé, Don Ottavio, who swears to avenge her father’s death. Donna Elvira, the abandoned wife of Don Giovanni, looks for her husband. The Don manages to slip away, leaving her with Leporello.
A group of peasants celebrates the wedding of Masetto and Zerlina, whom Don Giovanni tries to seduce. Donna Elvira arrives and warns the girl of the Don. Anna and Ottavio then enter and ask Don Giovanni to help find the Commandant’s assassin. Elvira begs them not to trust him. Don Giovanni tells Elvira she is foolish before chasing her away. When he takes his leave, Anna suddenly realizes that Don Giovanni is the man who attacked her.
Leporello has led the wedding celebration into the garden. Looking forward to the prospect of new conquests, Don Giovanni sings of his happy pursuit of love. Zerlina begs her fiancé’s forgiveness. When the Don appears, Masetto’s jealousies flare up again. In order to trap the seducer, Anna, Elvira, and Ottavio, in masks, also come to the party. The Don succeeds in leading Zerlina into his quarters. When she calls out for help, the three in dominoes unmask and threaten their host, who manages to get away.
Don Giovanni serenades Elvira but then leaves Leporello in his place and goes off to seduce her maid. He is soon interrupted by Masetto and a band of armed peasants who have decided to kill Don Giovanni. Disguised as Leporello, the Don sends them off in the wrong direction and, remaining alone with Masetto, he assaults him before escaping. Zerlina rushes over to tenderly console her fiancé. Confronted by Anna, Ottavio, Zerlina, and Masetto, who want their revenge, Leporello reveals his true identity before fleeing in outrage. When Anna leaves, Ottavio again sings of his passionate love for her.
In a graveyard, the Don and Leporello exchange recent experiences when, suddenly, they hear a voice from beyond the grave. When they discover that it is coming from the statue of the Commandant, Don Giovanni forces Leporello to invite the statue to dinner. The statue accepts the invitation. In her quarters, Anna begs Ottavio to wait until she is out of mourning and her father’s death has been avenged before marrying her. Elvira tries once more to reform her husband. The statue arrives and also asks Don Giovanni to repent. He refuses and is subsequently pulled into hell. Witnessing the disappearance of Don Giovanni, everyone gathers for the moral of the story: “The death of a sinner always reflects his life!”