In a middle class family in Buenos Aires, a conflict arises between their two sons. One is a carefree playboy who spends his nights on cabarets. The other, a promising engineer who is the pride of the family.
Some students in a boarding house have to face the reality of everyday life in pursuit of their goals. The life of one, Carlos, changes drastically when he falls in love with the hotel maid.
The film, which contains exterior scenes filmed in the Paraná Delta, narrates a confrontation between troops from the Argentine Naval Prefecture and some silk smugglers on the Paraná River.