Even Immortals Have Their Own Troubles

So what if I'm just a nobody from the modern city who stumbled into a mess? I can still rub shoulders with the immortals and make a name for myself! My master doesn't like me? I don't care! He can't get by without me, because I'm the only one who can pull out that deadly sword! That divine beast, that magical treasure, I'll gladly take them off your hands! In the world of immortals, you're never free to do as you please!