This is a favourite of mine. In this, I would be new to a city, visiting and curious. I could slip into a bdsm/fetish shop, be talked into trying on some of the outfits and restraints, and be kept as the shops unwilling model, or the owners kept companion. I could alternatively help someone who was kidnapped to escape, be tracked down, and snatched to take her place.
If either idea appeals to anyone, let me know.