A shady psychiatrist has hypnotised his patient and discovered her deep dark desires of bondage and being kept helpless. He goes to someone he knows who either a. wants revenge against her family and kidnaps her or b. runs a slave ring. He kidnaps her, keeps her helpless (tied, gagged, chained, whatever) with no intentions of ever releasing her...because either, under scenario a. he falls in love with her and her submissiveness or b. he sells her off after he's tired of her. Non-consensual sex all right since she'll be bound and won't be able to stop him. In the process, he taps in to her sexual awakening.
See ons/offs for what I like and don't like. Anything not listed, I'll let you know if I don't like it. After all, if I haven't tried playing it, I won't know.
PM me if interested.