According to the IMDB, this was American star Guy Madison's second European film, after SLAVE OF ROME and before SWORD OF THE CONQUEROR and EXECUTIONER OF VENICE. Madison went on to have a successful and prolific "second career" in Europe throughout the 1960's. This film plays very much like an old pulp men's magazine story come to life. A boatload of scantilly clad and sweaty female convicts from France are on their way to Devil's Island, the infamous French penal colony on the coast of South America. One of them is also looking for her sister. We are treated to various abusive policies by the corrupt prison-camp management and guards, along with sexual exploitation of the women by officials looking to trade favors for attention (don't get excited here--you could show this film to an eight-year-old!). Thirty minutes into the film, handsome, rugged Guy Madison arrives to take over administration of the penal colony, and he's something of a reformer, stopping the abuse and punishing those who do not respect the human rights of the prisoners. That doesn't win him any popularity among the old guard. Madison also falls in love with one of the prisoners, but Madison's character is not exactly what he seems to be, and there's also a question of a cache of hidden gold... Unfortunately, Mr. Madison does not dub his own voice, although the voice assigned to him is not too distracting. He plays the role with class and authority. The rest of the cast, with exaggerated gestures and exaggerated dubbing, along with the period costumes and the low-budget historical settings, give the whole thing a pulp-magazine-illustration feel. Collectors of women-in-prison films may want to seek this out as an early (and tame) example of the genre, and Guy Madison fans should be satisfied (even though he doesn't appear for 30 minutes into the film), but overall I'd rate it only "average" among early 60s Italian costume dramas.
Director Domenico Paolella directed many excellent costume adventures and peplum films, and later the intense Eurowestern HATE FOR HATE, and worked with many American actors in the 60s.