During his film career Douglas Fairbanks, Jr. could probably have done more films along the line of Sinbad the Sailor. But my guess is that he didn't want to be typecast in quite the same way as his father was. Still it's a treat to watch him in this and in other films like The Fighting O'Flynn, The Exile, and The Corsican Brothers where there's more than a hint of his inheritance.
Sinbad the Sailor is the Baron Munchausen of the Islamic world. The stories of his seven voyages are a large part of the Arabian Nights fables.
Fairbanks shows him spinning the tall tales to the listening crowd in Basra and when they tell him to give them something new, Fairbanks relates the latest tale of his eighth voyage. Doing it in flashback that way kind of spoils the ending because it does say that he will survive to tell the tale. Nevertheless it's quite a story involving a greedy emir in Anthony Quinn and an evil magician in Walter Slezak who along with Sinbad is seeking the fabled treasure that Alexander the Great, that noted infidel, amassed during his conquests.
Of course there is that redheaded Kurdish princess played by Maureen O'Hara who has her own agenda working. In her recent memoirs Maureen full realized the ridiculousness of casting her in roles like these. But she said her philosophy was keep working and eventually the good parts will come your way.
It's an enjoyable film however as Fairbanks makes that final journey and finds what true love and happiness are all about.