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.
A peasant who works in a mahogany camp in the Mexican jungles with his family is disgusted with the miserable living conditions imposed upon himself and his co-workers, the peasant finally spearheads a revolt against the sadistic bosses.
Cantinflas works as a porter, who writes letters and speeches in his old writing machine to earn an extra money, despite the fact that he still goes to school. The sentimental issues come when Cantinflas falls in love of his pretty neighborhood (Silvia Pinal), who is handicapped and unable to walk. The thing wont be easy, because a young military man also has feelings for the girl. But the porter wants to see her happy, and he will become a sort of Cyrano De Bergerac, writing love letters to her signed by the young soldier. His plan is simple: to win money in the horse races in order to pay the operation which will make her walk again.
Aurelio Rodríguez is released from jail, and tries to start a new life marrying Paloma and working his land. But the local landowners, the brothers González, interfere with his plans.
On a small Mexican island dwells a group of Indians who live in the traditional manner and who disdain outsiders. The beautiful Maclovia and the poverty-stricken Jose Maria are in love, but her father refuses to allow their marriage, or even any communication between them, due to Jose Maria's lack of means.
Called by the Mexican President himself, and in spite of a heart condition, young teacher Rosaura Salazar travels to the deserted town of Rio Escondido to accomplish the mission of bringing education to the poorest people. Being there, Salazar has to fight Regino Sandoval the evil landlord of the town. He has transformed the town into his own property, imposing his will and spreading death everywhere.
