On the day that they receive their university diplomas, three young men make a bet: they will marry a rich woman and meet again one year later.

Ribera, a singing teacher, is a neighbor of Fernando, with whom Sara, Enrique's wife, is having an affair.

The old hidalgo Don Alonso Quijano, maddened by the excessive reading of books on chivalry and determined to become a famous and heroic knight-errant, leaves his village and sets out on the road in search of adventure, accompanied by his faithful friend Sancho Panza.

Madrid, Carnival Sunday. A night watchman finds the body of a woman, a rich and greedy moneylender who has apparently been murdered. The prime suspect is a watchmaker who owed her a lot of money.

Silvia Heredia, since her arrival to Madrid is staying at her best friends' house, Mary. Her aim is to work as a secretary of a famous novelist. But at night the house is full of people and they confuse her with the owner of the floor. A series of misunderstandings makes her meet Ricardo Ariaga, the musician whose opera "Life begins at midnight" is about to debut. Ricardo convinces Sylvia to act as his wife. With a "rented" child they try to be the perfect family of a lonely old man.

Father Luis Lastra is a young priest who does his job in the village of Peñascosa. There he meets Marta, a beautiful parishioner very interested in religious matters, so much that she convinces the priest to accompany her to the convent to become a cloistered nun. Along the way, they have to stop at an inn for the night and that's where Father Luis will test his faith.

In Madrid, Spain, at the end of the 19th century, the young and reckless Basilio seems to be the only person who perceives the spectral presence of Professor Robinsón de Mantua, who begs him to take care of his niece Inés, because she is in grave danger.

Madrid, late 19th century. A wealthy woman is found murdered in her home and her maid seems to be the main suspect; but her statement further entangles the case.

Fernando has just finished the military service. It decides to buy Bucéfalo, the horse that has been his partner for this time and returns to Madrid removing with it to the animal. But everything has changed, the city already neither is the same and even he nor finds stables nor has time to attend to it. This way the things remedy will not have any more that to look for any solution.

Two fairy godmothers struggle to make their godchildren not fight and love each other, but a third person intervenes and worsens the situation.