Spiritual qi revives in another world, and sealed-away spirits and monsters awaken one after another.
The occult arts recorded in ancient texts are incomplete, their lineages broken. Practitioners relying on nothing but their mortal bodies cannot hope to withstand the coming catastrophe.
Humanity therefore finds another way: using mathematics and physics to calculate yin and yang, and machines to carry magical principles. With technology as their shield and occult arts at their core, they fight their way to survival amid the chaos.
