Catita goes with her husband to spend the honeymoon in Rio de Janeiro and on the trip they fall into the hands of a player who will try to use them to achieve their ends.
Gumercindo is a simple man who sees the daughter become pregnant of the son of its boss. Determined to demand that his grandson have a father, he joins neighbors to seek justice in his own way.
An wealthy Italian immigrant from São Paulo, watches closely the suitors of his daughter Fiametta, whose two previous husbands "suffered accidents" because they did not bear good children. She can only get pregnant of someone who, like her, bears the blood of the rare K factor.