Friends Alberto and Jorge, who work together in an insurance company and live in the same building, are married to two sisters (Elsa and Alicia). When they go on vacation to Mar del Plata, Alberto and Jorge decide to enjoy their "single life". In addition to this, they have to fulfill a duty entrusted by their boss: to find the revue theater entrepreneur Félix Sagastume, to sign an insurance contract. It is in a canteen where they go to look for him, and there they meet two aspiring vedettes (Zuzú and Bibí), who confuse them with important businessmen and see in them a possibility of achieving fame.
Juan Carlos, a businessman, falls in love with a woman much younger than him, and ends up marrying her. Juan Carlos' mother-in-law, following an incident with him, tells him a fabricated story: that the father of her daughter is a stranger, with whom she had sex in the car of a train. Coincidentally, this situation had happened to Juan Carlos many years ago, and now, with the doubts that his wife is his daughter, he does not even want to approach her on his wedding night.
Catrasca (Jorge Porcel) is a man who works in a restaurant and in his spare time helps in a children's home. His problem is that he carries a family tradition that makes him cause catastrophes in his path, one of which takes his boss (Adolfo García Grau) to the hospital. Upon leaving the hospital, Catrasca is run over by Graciela (Graciela Alfano), the daughter of Professor Galíndez (Osvaldo Terranova). This is how he meets this professor, who has a formula that says he will be the salvation of humanity, so he is the object of persecutions by villains such as Dr. Linda Winters (Moria Casán).
