Based on a true story about Soviet spy Lev Manevich. He lives in Italy and operates in the Nazi Germany and Austria. Manevich, who is posing as a businessman, collects information about the latest German airplanes made by Messerschmitt for Luftwaffe. On his spying trip to Berlin, Manevich noticed that a stranger was following him. Now his life is in danger, but he must do something to complete his...

Herminio, a student from Milan, arrives in the port town. From his old friend Carlo, the owner of the tavern, he learns about the embezzler governor, who imposed an exorbitant tax on fishermen, that the governor is going to marry his wayward son to a rich widow, the beautiful Charlotte, with whom Erminio is secretly in love, and about the sinister sea robber Gasparone, whose role is to be played.....