Landru, a French businessman, arrives Mexico with the idea of promoting their fighters, what nobody knows is that besides Landru promoter and fighter is a mad scientist who seeks to alter human genetics mixing it with the animal to make stronger and fiercer to their gladiators.
Irma, the secretary
A young man goes to the capital to prove himself as an opera singer, after being rejected he must find other means to achieve fame
Tin Tan falls in love with a young woman who does not love him, but when he wins the lottery she changes her mind.
Doña Angustias
This musical comedy tells the story of two men whose friendship (whose beginning is told in "A toda máquina") is affected by assumptions love triangles and misunderstandings between the two, however, the value of that friendship overcomes all difficulties.
Doña Angustias
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.
Mercedes
(uncredited)
The Trevino family tries to overcome the irresponsible behavior of Don Cruz, an erratic father with numerous defects that contrast with his son Silvano, a young kid man that is incapable of passing judgment on his own father.
Estudiante colegio (uncredited)
Returning to his home town, seminarist Miguel is forced to trade the robes for a charro costume in order to solve several problems that appear in his way, including the female kind.
Margarita (uncredited)
Pedro has had many lovers but he only loves one of them, but this romance stop going on for his flirts with other women.
Vecina (uncredited)
Pepe el Toro is married to Celia la Chorreada and they have two children.
