"The Chaser". Why won't this play?

[chas speed]

I was at a pawn shop in the U.S. and they were selling 5 Blu-rays for 10 bucks and I did a blind buy on a French Blu-ray of a Korean film called "The Chaser". I have a region free player and I wasn't worried about it not playing, but when I put it in my machine it just says something like BD and when I click that I get access to some files, but I still have no idea how to play it. This has never happened to me before. It doesn't really seem defective, but I don't know how to get it to work. I do not have my machine hooked up to the internet.