Marcos is an arrogant jai-alai player who seduces and discards women until he himself becomes the object of a cunning revenge.

Cantinflas, the boyfriend of the servant of a rich industrial man, gets into the house in order to kill a mad dog. Suddenly this man appears so the servant tells him that Cantinflas is his wife's brother (Leonardo), who had been lost for years. The rich man then remembers that his father in law's testament could only be paid when all brothers get together, so treats Cantinflas, a real bum, as a king.

A great love story based on the idea and development of the famous monument that decorating Mexico City.