Florence in 1848. There is a strong political tension in the Grand Duchy of Tuscany. Giovanni, a young Neapolitan composer who has just arrived in the city, accidentally comes into contact with some liberals and is convinced to compose the hymn of the Volunteers.
| Actor | Role |
|---|---|
 Vittorio De SicaGiovanni | Giovanni |
 MillyGrazia | Grazia |
 Enrico ViarisioL'avvocato Piccoli | L'avvocato Piccoli |
 Giuditta RissoneCarlotta | Carlotta |
 Carlo NinchiCesare Baldi | Cesare Baldi |
 Ada DondiniDonna Giuditta | Donna Giuditta |
 Renato CialenteIl barone | Il barone |
| EEnzo BiliottiIl cavalier Rivolta | Il cavalier Rivolta |
| GGiovanni BarrellaImpresario milanese | Impresario milanese |