This is one of the better Category 3 films I've seen. A lot of cat 3 films wallow in filth to acquire their rating but this has a fairly "good" story. The movie revolves around a young man who is picked on and used by the people around him. He's socially akward and very timid...until his father (or grandfather) dies. It is at this point he obtains a medicinal journal from which he creates an aphrodisiac to control people. Now this does fall into the category of rape but nothing is really violent about it. The movie doesn't just fall into sexploitation at this point, it keeps it's focus on who "deserves" punishment. The "hero" however falls prey to the power and ego that goes with it leading to an "unhappy" ending.
It's hard to recommend a "rape" movie and all though this isn't a "tasteful" drama it is a measured cat 3 film that does keep its perspective.