Two couples live through attraction, distraction, sympathy, friendship, quarrel, jealousy, fidelity, and the Devil supervises it all by delivering solemn warnings in choice moments.

Portuguese Rock'n'Roll history since the late 50s

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.

António, a factory worker of immense musical talent, is discovered by a business man who launches him as a singer. Nevertheless, this changes the man's life for better and for worst.