"Martine Foucher" (Michele Mercier) just happens to belong to an aristocratic family in France which is opposed to the monarchy during the French Revolution. Even though she is innocent of any crime she is sentenced as a political prisoner to hard labor for life on Devil's Island. We then learn that two years earlier her sister "Jeanette" (Federica Ranchi) had also been sent there and once they meet she helps Martine escape with her into the jungle. Unfortunately, things don't go as planned as Jeanette is killed and the other women who escaped with her are tortured. However, a new governor named "Henri Valliere" (Guy Madison) just happens to arrive at this particular time and is revolted by the way the women are treated. It turns out however that things aren't necessarily as they seem. Now, rather than disclose some of the surprises and risk spoiling the movie for those who haven't seen it I will just say that this is a curious "Women in Prison" film that sometimes seemed almost like a matinée. Neither the acting nor the action scenes are that great but it's still entertaining to a degree. There are also some attractive ladies on hand with a beautiful blonde by the name of "Rosy" (Margaret Rose Kiel) as probably the best of the bunch in my opinion. Be that as it may, this is an okay movie and overall I give it an average rating.