I wrote a whole story on who the two guys are that sit in that corner. it s not important for the story. Basically Gab escaped and fled into a back entrance of an sm club, where these two where having (consensual) fun, which looked... a bit different in Gabriel s eyes. So she rescued the sub and abducted the dom as well. when she learnt, that they were doing this for fun, it doesnt make sense to her and she thinks, the sub is somehow brainwashed. While she tries to teach them, she has to leave to calm down and the whole area gets flooded. But thats not set in stone. maybe i make something else up. whatever it is: these people probably had some kind of argument and gab tries to help them solve their problem...