From the introduction:
Tale of Phantasmal Land is a theatrical roleplaying game about uncovering mysteries, getting to the root of the strange problems that pop up from time to time, having fun while doing it, and looking good all the while.
The game takes place in a land called Gensokyo, a small pocket of Japan that has been hidden safely away from the outside world for well over a century. All this time it has been protected from the relentless march of human progress and mundane intruders by a powerful ward called the Hakurei Barrier. Although still home to a fair number of humans, Gensokyo has become home to all sorts of fantastical beings, even gods. All of them have sought sanctuary from the outside world. Things that are nothing more than myth and legend to you and I, still live and breathe and are a part of everyday life in Gensokyo.
User summary:
The game is based on the Touhou Project (東方 Project), or Project Shrine Maiden, series of computer games developed by Team Shanghai Alice's Zun.