So basically, it's like a mafia game: 10 guys are going on a trip to wherever, but one of them is secretly a kidnapper/dom while the others are secretly kidnappees/subs!
The story can go many different routes from here: you can have the kidnapper secretly taking down the kidnappees one by one or the kidnappees realising who the predator is and ambushing him; too many ideas!
Many things can be changed while still keeping the story's skeleton: if there would be someone willing to write this I'd think it unfair to be held back by some numbers I've randomly come up with. You can have 5 guys or 17 or 3 or however many and 2 doms or 10 doms
I realise this is kind of a complex idea, so totally understand if no one's willing to pick it up, but I can never fully know my luck!
Best regards, Sockgaggedman