Ok, lessee, summary. Correct me if I'm wrong.
Your character lives in a prudish town. During her College years, she moved to a big city to get her medical degree, and managed to keep the financial strings together by working as a stripper/nude model. Now that she's back in town, she assumes that nobody around knows about that embarrasing little detail from her past and continues to live her happy life.
Now, a couple of years later it comes to hunt her, someone using nude pictures of her to blackmail her into doing embarrasing stuff. She has no idea who it is, could basically be anyone close to her. He let's her work deeper and deeper into her nets, as he makes her give him more and more material to blackmail her with.
Ok, you make a description of your character of course. Seeing as she has her own pool, she lives a reasonably luxurous house?
You can also make the description of any of the mentioned NPC's that you want to do (though I'll be playing them). I'll take the description of the other NPC's.
Guess this is going into the NCNF. Doesn't seem to contain anything supernatural.