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.
| Actor | Role |
|---|---|
 Sandra BréaFiametta | Fiametta |
 Ney LatorracaTomasino | Tomasino |
 David CardosoOmar | Omar |
 Dionísio AzevedoGiulio | Giulio |
 FregolenteFausto | Fausto |
 Flora GenyAnselina | Anselina |
 BentinhoVincenzo | Vincenzo |
 Jussara FreireProstituta | Prostituta |
| FFrancisco NegrãoDr. Mariano | Dr. Mariano |
| CCarlos BuckaBeppo | Beppo |
 Heitor GaiottiNot listed | Not listed |
 Cavagnole NetoNot listed | Not listed |
 Gilberto SálvioNot listed | Not listed |
| RRubem BiáforaNot listed | Not listed |
| ZZaira CavalcantiNot listed | Not listed |
| EEdward FreundNot listed | Not listed |
| AAbdala MansurNot listed | Not listed |
| PPaulo AguiarNot listed | Not listed |
| JJosé Júlio SpiewakNot listed | Not listed |