In this one, I would be kidnapped and transported to a parallel earth via a portal in the basement of a shop in a city that I'm holidaying in. In this parallel world, slavery would exist, and bdsm would be more accepted, more mainstream. Perhaps due to a shortage of women, women from parallel earths are brought there to be sold, with me just the latest.
Or, someone transports themselves from their earth, where their version of me has died, and want me to take her place.
If this appeals to anyone, let me know.