I've seen the ads for this during the Olympics, and apparently the gist is that society fell apart and warlords run everything, or something like that.
Here's what I don't get: why do they have the characters using swords and bows/crossbows? I would think guns would survive the collapse of society, and bullets would last for at least a couple of decades after the collapse.
Like I said, stupid question. Stuff like this bugs me for some reason.