A young man is dedicated to singing, but only for his friends, and his godfather wants him to do it professionally.

Policarpo De Tappetti is a calligrapher who works under the orders of Don César Pancarano de Rondò. For many years, Policarpo has been seeking a promotion and a raise that never comes, and, it seems, will never come. One day, Jerónimo, the son of Don César, meets Celeste, the daughter of Policarpo, and falls in love with her. Policarpo sees in that relationship the solution to his aspirations at work, and does everything in his power to make this relationship fruitful. Don César, who presumes to be a count, sees with very bad eyes that his son meets a girl from such a different social position, and does just the opposite. But the efforts made by both parties will be of no use, since Celeste has fallen in love with Mario Marquetti, a "specialized mechanic" (typist) who is giving private lessons in the offices of the businessman Franquinet .

Garcia, a shy young musician who can not release any of his works, is in love with Lupe, a singer who makes a living working in a modest amusement park.

In Madrid, under Queen Isabel II reign, rebellions are frequent events. During one of them Captain Jorge de Córdoba, nicknamed Veneno (poison) for his quarrelsome disposition, bad temper and outright misogyny, is hurt and taken to a house where two women, a widow and her daughter, are to take care of him.

A group of taxi drivers try to reanimate a young woman who has been close to being run over by one of them. To improve her mood all of them tell her curious anecdotes featured by peculiar customers

After the execution of the spy Mata-Hari, the secret service takes the opportunity to arrest some of her collaborators. To arrest one of the ringleaders, they use his girlfriend Niní, a naive dancer. The girl, tired of being manipulated by everyone, decides to become agent X25.

In Spain, during the Napoleonic rule, the French Governor of Andalusia is besieged by the locals who have countless demands and wishes.

The lawyer Angela Goñi is working in two cases at once: an man that wants to take to Pilo, a young orphan, tp a protection child school. And Mili, another young woman neglected by his father, a businessman, whose aunt Teresa wants to claim through the courts. Taking advantage of the amazing similarity between the girls, the lawyer makes many things to try to resolve the situation as happy as possible.