João and Jaime work as taxi drivers for the same company. But, once the company's vault is robbed by Raul, the manager's son, João is the one to blame.

Leonel is a pianist, nostalgic of sweet melodies, while his son is the (real-life) leader of Os Gatos Pretos (black cats), a twist musical group. The conflict is eventu ally solved when Leonel's daughter, Cilinha, starts dating Raúl, a well-off young man, who promote a new dancing club, the Lisboa Antiga e Moderna, where old new music get even shares.

A famous singer conducts two relationships at once, with a businesswoman and her secretary. He marries the woman, has children from both, and all goes well for him until one fateful day, when his two sons come to know that he is parent of both, at school.