A country braggart bets that he can spend a night with a local beauty. When he is surprised by her husband, he is not only forced to pay his friends money but also challenged to come up with a new identity other than Casanova or Don Juan.

Everything unfolds in Naples seventeenth century, when a mysterious masked swordsman who calls Salvador Rossa becomes champion of the needy and lonely struggle against the cruel tyrant that frightens the country.

Called to perform at the Scala, a young baritone begins a transatlantic romance with a famous pianist. The singer, having been skewered by a critic after his last performance in Milan, attempts to find a way to win over the audience and the critics, while wooing his love interest.