Rosana is an attractive teacher who is losing his youth with such discipline in the study. When suddenly bursts into his life a perfect cheeky who lives of game and odd jobs as photographer, but wants to acquire a little culture for personal reasons. So he hires the services of the best teacher of the place ...

Guillermo's family has been living for years a terrible curse. All the women in his family have died because of love and murdered by men of the clan. The funny thing is that before each death a cat appeared. One day, while Guillermo prepares the papers for his marriage with Beatriz, he discovers that both are distant relatives.

One man becomes each day more and more fat. The exercise does not help him. Finally he goes to the doctor that finds out his problem: he is pregnant.

In a sector of Madrid inhabited by families of a well-off class, a gang of boys and girls has continuous fun, sleep and drink, while their parents ignore practically everything. However, each of these young people has, to a greater or lesser degree, a problem. The parties and parties enjoyed by a group of young people from the upper class are the basis of the story that explains this film. Among them we find the famous couple, once happy, formed by Carlos Larrañaga and María Luisa Merlo. Directed by Fernando Palacios, and with a script by Rafael J. Salvia and Pedro Masó, " It's always Sunday " has no greater intention than entertainment, despite giving history a certain sociological touch, for that of valuing the behavior of the Youth of the time.

Peter is a widower who writes crime novels, signing as Peter P. Peter, and is about to marry Beatriz (Analia Gade), a widow who proves to be a ruthless woman who makes his life miserable. As an expert in inventing crimes committed by his characters, he imagines a plan to get rid of his new wife. The trouble is that she also plans to kill him.

Don Rodrigo goes to the bank and when he is going to take his money there is a robbery. Then the bank refuses to give him his money back (257 pesetas, a small amount of money) with the argument that the money was robbed to him, not to the bank. He will fight against the bank till the last consequences.

Don Juan Alcántara is ruined. He does not dare to confess it to the family, since the unanimous opinion of those who know him is that he is a weakling. His lack of character is remedied by his doctor - pretend that he is suffering from schizophrenia.