Basically, Olga's a bad person who likes to turn girls into drug-addicted prostitutes, which involves a lot of torturing them into submission. In 1964 I'm sure the torture scenes and all-but-shown lesbianism would have been shocking, but today it won't even raise an eyebrow. Acting is extremely poor--the vast majority of the girls supposedly being horribly tortured look more put out and bored rather than in pain, and the plot is nonexistent. There is no dialog, just voice-over narration, with a few comments from Olga but mostly by an upright male who is incensed at her methods. The musical score is extremely annoying, especially when it consists of "Chinese" music that the filmmakers must have only had about two minutes of, forcing them to loop it over and over. Oh and speaking of Chinese, this movie is pretty overtly racist, underhandedly blaming the Chinese for a lot of society's woes, even though there is a grand total of one Asian character (a nameless henchman who is in maybe two scenes) in the entire film.
It was interesting to see where the genre came from, but I'm only giving it as high as a four for unintentional hilarity and some wonderfully ridiculous overacting by Olga.