First, let me make this clear: this is not Christianity, nor is it entirely Western.
It draws on some Cthulhu Mythos, though heavily reworked and quite different from traditional Cthulhu, as well as myths from peoples around the world, so there are quite a lot of them.
The ascension of Qiu Linyun, the pope of the Eight Hundredth Generation, ushered in an age of prosperity. But what lies hidden beneath this golden age? With the loss of the Nine Provinces' sacred stones, the Church splits, foreign religions flourish, and the nations descend into chaos. What will happen next?