Aspiring opera singer Luis Landa returns to his hometown to avenge the murder of his brother.

A drifter lands a job as an officer in México City's elite motorcycle police unit and gets home with a mate of this unit. The mate is in love with a girl, but he and she are always making jealous to each other. The drifter and the mate get involved themselves in a fight to become the winner of conquering ladies and performing unit acrobatic tricks, interfering with their friendship and profession.

Lower-middle-class ligger rescues a girl from her abusive father and practices for a high-profile dance contest.

Cantinflas is a clumsy fireman, who one day receives the visit of his little goddaughter, whose mother recently died in the jungle. After having work in a few fires, Cantinflas decided to quit and become a policeman, because is less dangerous. Everything goes well until a gang of gangsters kidnap the girl, because of a monetary inheritance.

Vindictive rich girl spreads rumors about her rival being a witch. Townsfolk get all agitated.

Shady promoter hires a new boy for his boxing stable, but the young champ won't go along with his boss'es scams and machinations.

A humble bartender falls into a world of gambling and vices, losing everything.

Cholita, after a long absence in Mexico City, is returning home to take up her duties as head of the rancho and, as everyone expects, to marry her childhood sweetheart José. Expectations are somewhat dashed as she shows up with Fernando to whom she is engaged. This makes José and Cholita's uncle more than a little bit put out as Fernando is not only not a Mexican, he is also a city slicker afraid of the country.