A group of juvenile delinquents live a violent life in the infamous slums of Mexico City; among them Pedro, whose morality is gradually corrupted and destroyed by the others.

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.

In the drama, a father, firmly believing that the baby daughter in his arms is not his own, abandons her upon the doorstep of the town drunk. Many years pass, and the man finds himself continually wracked with guilt about deserting her.

Pepe el Toro is married to Celia la Chorreada and they have two children.

Called by the Mexican President himself, a rural teacher goes to work in a village that is dominated by a malevolent chieftain.

Three children forge a close friendship with the help of a gentle elderly woman, Doña Dominga. They survive poverty and social exclusion; however, fate has a cruel twist in store for little Toño.

Ex-con rebuilds his life after being discharged from prison.