The action takes place in Seville in the "era of beautiful costumes." Don Juan's father, Tenorio, complains to Diego's father that his son, a twenty-year-old young man, is completely not interested in women. His soul is wholly owned by geometry. And even in a brothel, he plays chess. This conversation takes place during a masquerade preceding the wedding of Don Juan and Donna Anna, daughter of Don Gonzalo, commander of Seville. Don Gonzalo promised his daughter Don Juan as the hero of Cordoba: he measured the length of an enemy fortress, which no one else could do.
A masked couple comes in. The girl kisses the hands of a young man, assuring that she recognized them; she saw Don Juan playing chess in a brothel, and she, Miranda, fell in love with him. The young man claims that he is not Don Juan. Seeing the real Don Juan behind the column, Miranda runs away. Don Juan confesses to a young man who turns out to be his friend Roderigo, who, while free, wants to leave, because he cannot swear eternal love to Donna Anna, he could fall in love with any girl she meets. Having said that, Doi Juan is hiding in a dark park.
Enter Father Diego and Donna Anna without masks. After a short conversation with the priest, in which the girl admits that she is afraid to marry, she jumps over the balustrade, through which Don Juan jumped shortly before, and disappears in a dark park so as not to meet Don Juan.
Miranda, meanwhile, weeps in front of Celestine, the mistress of the brothel, confessing her crazy love to Don Juan. Celestine is angry and says that the whores “do not trade in soulfulness” and should not fall in love, but Miranda can’t overcome herself.
The next day, Donna Iney, a bridesmaid, combs Donna Anna, sitting in a wedding dress. All of her hair is wet, they come across grass and earth. Donna Anna tells Donna Ineya that she met a young man at night in the park and first knew love with him. She considers only him alone as her fiancé and is looking forward to the night so that, as the young people agreed, they will meet again in the park.
Don Gonzalo and father Diego rush girls. The wedding begins. Donna Elvira, mother of the bride, father of Don Juan, don Roderigo, three cousins of the bride and the rest enter. When a veil is removed from Donna Anna, Don Juan is speechless. To the question of Father Diego, is Don Juan ready to swear that while he is alive, his heart will remain faithful to his love for Donna Anna, Don Juan replies that he is not ready. Last night, she and Donna accidentally met in a park and fell in love, and tonight Don Juan wanted to abduct her. But he did not expect that the girl would be his bride, the one who was supposed to wait for him alone. Now he does not know whom he really loves, and already does not even believe himself. He does not want to take a false oath and wants to leave. Don Gonzalo is going to challenge him to a duel. Donna Elvira tries to calm him down. Don Juan leaves, and Donna Anna reminds him of an upcoming date. Her father rushes in pursuit of the groom, orders three cousins to surround the park and lower all the dogs. Everyone except Donna Elvira leaves. She believes that Don Juan is just a miracle. The scandal culprit runs in, he threatens to kill the whole bunch and is not going to get married at all. Donna Elvira carries him to her bedroom. Returning Tenorio sees how Donna Elvira and Don Juan, hugging, run away. Tenorio is terrified. He has a heart beat and he dies. Celestine, meanwhile, is dressing Miranda in a wedding dress. Miranda wants to appear before Don Juan in the guise of Donna Anna. Let him only once in her life take her for his bride, kneel before her and swear that he loves only this face - the face of Donna Anna, her face. Celestina is sure that Miranda will fail.
At dawn dusk, Don Giovanni sits on the stairs and eats a partridge. In the distance, dogs barking. Don Roderigo enters. He wandered around the park all night hoping to find his friend while he hopped from bedroom to bedroom. At the pond, he saw his bride, sometimes she sat motionless for hours, then suddenly she broke off and wandered along the shore. She is sure that Don Giovanni is on a small island, and it is impossible to dissuade her. Roderigo believes that Don Giovanni needs to talk to her. Don Juan now can’t talk about feelings that he doesn’t feel. The only thing he feels now is hunger. Hearing the noise of footsteps, friends hide.
Three cousins come in, they are all in the blood, ragged and exhausted. Don Gonzalo learns from them that they had no other choice and they killed the dogs because the dogs attacked them. Don Gonzalo is furious. He intends to avenge Don Giovanni for the death of dogs.
Don Juan is about to leave the castle immediately, for he fears a “quagmire of feelings”. He admits that he reverence only for geometry, because before the harmony of lines all the feelings crumble to dust that people’s hearts are so embarrassed. In geometry, there are no whims from which human love is composed. What is fair today, fair tomorrow, and everything will remain just as fair when it is gone. He leaves and is sure that his bride will be comforted by another, and goodbye tells a friend that he spent the night with his bride, Donna Ines. Roderigo does not believe. Joan says he was joking. Roderigo admits that if this were true, he would kill himself.
A woman dressed in white comes down the stairs, her face hidden by a black veil. Don Juan is surprised why she came, because he left her. He informs her, thinking that in front of him is Donna Anna, who spent the night with her mother, then visited the second bedroom, then the third. All the women in the arms of a man are the same, but the third woman had something that everyone else would never have: she was the bride of his only friend. Donna Ines and Don Juan tasted the sweetness of their own baseness to the very roosters. Roderigo runs away in dismay. Don Juan sees that Donna Anna still believes in his love, and forgives him. Don Juan is convinced now that they have lost each other to meet again, and now they will be together, husband and wife, all their lives.
Don Gonzalo comes in and informs that Don Roderigo had just stabbed himself, and before his death he cursed Don Juan. Don Gonzalo wants to fight Don Juan, but he, shocked by the news, annoyedly dismisses Don Gonzalo's sword, as if from an annoying fly. Don Gonzalo, struck by a lightning strike, dies. Father Diego enters, holding the body of a drowned donna Anna in her hands.
Another bride takes off her veil, and Don Giovanni sees that it is Miranda. He asks to bury the poor child, but does not baptize or cry. Now he is no longer afraid of anything and intends to compete with heaven.
In the next act, Don Giovanni was already thirty-three years old, by this time he had killed many husbands who kept him on guard and climbed on his sword. The widows hunted for Don Juan to comfort them. His fame booms throughout Spain. Don Juan was disgusted by all this, he decides to change his life, invites the bishop and persuades him to give him a cell in a man’s monastery with a view of the mountains, where he could calmly study geometry. In exchange for this, he offers to dissolve the rumor throughout the country that he, an inveterate sinner, was swallowed by Hell. To do this, he prepared all the scenery: he bribed Celestine, who dressed as a commander’s statue in order to take Don Juan’s hand and go down with him into a pre-arranged hatch where smoke would come from, and also invited witnesses - several ladies seduced by him. The bishop turns out to be Don Badasar Lopez, one of the deceived husbands, and convinces the ladies who arrived that everything that is happening before their eyes is a pure spectacle. They do not believe him and are baptized in fear. The rumor about the death of Don Juan safely spreads throughout the country, and don Lopez, unsuccessfully trying to prove that this is a lie, takes over.
Don Juan is forced to accept the proposal of Miranda, now the Duchess of Rondo, the owner of the forty-four-room castle, to marry her and live behind the fence of her castle so that no one sees him. In the end, Miranda informs Don Juan that she will have a child from him.
