Ramón y Socorro, a 50-year-old couple, owners of a tavern, embarks on a long trip to Mexico to attend the wedding of their son, Carlos, with Gloria, the daughter of an important Mexican businessman. Upon arriving in Mexico, Ramón discovers that in this country there is a divorce. Fed up with his wife, he decides to divorce without taking into account that he will soon pay the consequences of this act.
Don Mendo, Marquess of Cabra, gallant and dashing knight of medieval Castilian, is also a virtuous mandoline player and a specialist in climbing towers. But he has a bad run, all played and all lost at seven-thirty (card game), and lost his honor playing in his latest escalation of love to the apartment of his beloved and beautiful Magdalena. Don Nuño Manso de Jarama, father of Magdalena, has pledged the hand of his daughter to the Duke of Toro, and surprises Don Mendo in the room of Magdalena. To save the honor of his beloved one, Don Mendo says that no love has led him to the Tower, but he has climbed to steal. Magdalena is clean of all suspicion, and he is condemned to die buried in the castle wall. The Marquess of Moncada and other noble gentlemen, all friends of Don Mendo, facilitate his escape.
Pepe Conde, a poor simple man, is tricked by a rich marquis to believe he has sold his soul to the devil to win the attention of the woman he is in love with.
