André (Curado Ribeiro), is a son of a wealthy family who meets a girl called Luisinha (Milu). Luisinha lives at a small pension house with Rita (Maria Olguim) and Januário (João Silva), who are as parents to her, and with mr. Simplício Costa (António Silva), better known as Costa do Castelo, a lazy but highly talented guitar player who together with (Hermínia Silva) reaches success.
| Actor | Role |
|---|---|
 Maria MatosMafalda da Silveira | Mafalda da Silveira |
 António SilvaSimplício Costa | Simplício Costa |
 MilúLuisinha | Luisinha |
 Curado RibeiroDaniel | Daniel |
 Hermínia SilvaRosa Maria | Rosa Maria |
 Manuel Santos CarvalhoSimão | Simão |
 Luís de CamposGastão | Gastão |
 Maria OlguimRita | Rita |
| DDina SalazarNot listed | Not listed |
| IIsabel de CarvalhoNot listed | Not listed |
 Óscar AcúrcioNot listed | Not listed |
 Virgílio TeixeiraNot listed | Not listed |