In the tavern walking youth. Students of the University of Salamanca say goodbye to his friend: don Gaston graduated and now off to Madrid. Wine and songs flow like water, all praise the young and beautiful student. Don Gaston is full of joyful hope and shares with his servant Ambrosio plans for the future: he's going to do in the corregidora Madrid career and will be surrounded by pretty rich girls.
His mood spoils the innkeeper, who brings a long account. To pay for it, don Gaston should put all of your money. But to leave the tavern he was in no hurry: it turns out that the owner has a pretty daughter, Inez. She sings a love song and playfully responds to the attentions of don Gaston and his servants.
Suddenly, the tavern bursts bumbling fat. This is don Pinto de Fonseca, a nobleman from the province. At the behest of his father, he travels to Madrid to marry. Many years ago senior Fonseka rendered some service to his friend, don Pantaleone de Pacheco, and now he gives to wife, son, benefactor of his daughter Clarissa. Pass to the home of the bride don Pinto should be a father's letter of recommendation. But he had never seen his betrothed and inexperienced in dealing with ladies. Hoping to have fun, Gaston offers him a lesson in gallant manners. Ambrosio plays the bride, heartily making fun of a klutz, they rehearse matchmaking.
Don Gaston sees that this rude goof not a fit husband for noble girls. He decides to steal the letter, and himself to be the bridegroom. Pretty watered the don Pinto, Gaston stealthily pulls out the letter tells him to put a sleepy fat man in bed and goes to the house of Pacheco.
In the house of don Pantaleone reigns exciting waiting. The owner gathered everyone to announce that his daughter Clarissa married. Today must be the groom — don Pinto de Fonseca.
Clarissa is in a panic because her heart was given to a noble nobleman don Gomez. Brave and resourceful maid Laura is ready to help her mistress. She secretly leads to the house of don Pantaleone Gomez, who is willing to do anything to defend their love. With throbbing heart, Clarissa decided to trust to fate and his beloved. Now, however, they need rather to bring: Laura reported that here comes don Pantaleone.
Girls under the leadership of Laura decorate the hall for the celebration. When they leave, appears in the empty living room of don Gaston with his servant. Instead of the owner of the house they are greeted by Laura. Guest seems to be don Pinto de Fonseca, and Ambrosio immediately starts flirting with a pretty maid Donna Clarissa.
Appears don Gomez. Making sure that the stranger is don Pinto, he talks about his love for Clarissa, and, relying on the honesty and generosity of the guest, asks the groom to renounce marriage. Don Gaston sincerely outraged at first, but then agrees: for him, it's the easy way out of tidbits of history, which they themselves Ambrosio and started. After learning that don Pantaleone've never seen don Gomez, don Pedro offers to pretend to be in love for don Pinto and gave him a letter of recommendation. For the sake of his love, Gomez agrees to the deception, but asks Gaston to remain with him as a friend.
Guests and servants. They try to guess which of the strangers don Pinto. Appears the owner of the house. Don Gomez gives him a letter from an old the don Fonseca, and don Pantaleone joyfully welcomed the future son-in-law. Clarissa can barely believe his luck. Begin preparing for the wedding.
But suddenly the house bursts a real bride. In response to everyone's surprise, he declares loudly: "I don Pinto de Fonseca". But no one, including don Pantaleone, does not believe that this is a rough and rugged man is the most noble young man who gets a Clarissa. Everyone laughed at the attempts Pinto to pose as a groom and going to chase away the unwelcome guest. But he learns of don Gaston and accuses former friend of fraud. It almost wasn't ends with a duel, but Clarissa intercedes for Pinto. Not in forces more to hide the truth, don Gaston admits to cheating. Hoping that the father of Clarissa will give preference to a brave young man from a noble Spanish family, and not a cowardly fat guy he don Gomez reveal their real names. After some hesitation, don Pantaleone agrees to his daughter's marriage with Gomesom. And all, forgetting about the unfortunate Pinto, rejoice in the happiness of the young and opportunities to have fun at their wedding.