The Mexican Revolution serves as a backdrop to a torrid love triangle composed of three freedom fighters: a colonel, a widow, and a fiery female soldier.

The story focuses in on three young boys who, arrested by the authorities, await sentencing in Mexico City's Juvenile Court. One boy has killed his stepfather to protect his mother; the second boy has been goaded into blinding his chief tormentor; and the third resorts to stealing to support his family.

Pablo, a wandering laborer, has imprisoned himself in a hell of alcoholism. Cruz, a widow, reaches out to the troubled man, but even her compassion may not be enough to save him.

Cantinflas works as a model of tuxedos in a prestigious store, your job is to use the smoking in the street along with an advertising sign on his back. The use of smoking gives you access to exclusive places and meet important people. During this time, Cantinflas was the manager of an amateur boxer, it is an attractive nurse assistant and occasionally attending a priest in the church and the orphanage. However, a Cantinflas day while wearing tuxedo, is a rich man, who mistakenly believe that Cantinflas is a millionaire too.

Confronted with the unfortunate news that their favorite Streetcar, no. 133, is going to be decommissioned, two Municipal Transit workers get drunk and decide to "take 'er for one last spin," as it were. Unfortunately, the "one last spin" ends up being an all-night and all-day scramble to stay out of trouble, as they are confronted with situation after sometimes bizarre situation that prevents them from returning the "borrowed" Streetcar!

Alberto Robles, a young doctor, is faced with the decision to surrender to a life full of comforts and luxuries or to continue dedicating himself body and soul to serving those who need it most.

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.