In the kingdom of Kindaor, traitor Sedesmondo kills his brother, the King of Kindaor, and becomes the tyrant of kingdom. He abandons the prince Arminio to beasts in the woods, but lions don't kill him and breed him as one of them.

In the eighteenth-century Rome, Don Pasquale Corneto, wants his young nephew Ernesto, dedicated to a wasteful social life, to marry a rich spinster, both to save on the expenses of his maintenance and to increase the family heritage.

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.

Cipriano Duval is an Italian who has emigrated to Paris, where he works in a pediatric clinic as a nurse.