Vin involved in a cage fight

[jonniejosk]

I thought i've bookmarked it but I couldn't find it anywhere so I'm wondering if anyone know which story i'm talking about. In the story kids are kidnapped (or asked?) for illegal cage fight and Eli Joe is one of the men who behind all this. I think at one part Vin volunteered to fight so that Eli Joe would free the kidnapped kids.

Does this ring any bell?

Thank you!