La Venere dei Pirati plot
In 16th century Italy, on the Adriatic coast, the county of Doruzza is ruled by the cruel Count Zulian and his proud daughter Isabella. When they threaten to commit a gross injustice against one of the residents, Navy officer Mirko and his daughter Barbara intervene and are arrested. They are acquitted by the Duke Cesar de Santacroce, but immediately arrested again by Isabelle. Isabelle, unable to bear that Barbara is more beautiful, sends her to the Middle East as a slave. Mirko manages to escape and takes control of a ship to free his daughter.