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.
| Actor | Role |
|---|---|
 Victor Gomesa Rock singer | a Rock singer |
 Florbela QueirósCilinha | Cilinha |
 Américo CoimbraRaul | Raul |
 Ismael MerloLeonel | Leonel |
 Soledad MirandaBabá | Babá |
 Madalena Iglésiasa Fado singer | a Fado singer |
 Simone de Oliveiraa singer | a singer |
 Tony de Matosa singer | a singer |
 Lídia FrancoNot listed | Not listed |
 José OrjasNot listed | Not listed |
 Ruy FurtadoAgostinho | Agostinho |
 Nicolau BreynerNot listed | Not listed |
| AAlberto GhiraPadre Manuel | Padre Manuel |
 Carlos QueirozNot listed | Not listed |
 Delfina CruzNot listed | Not listed |