In the seemingly peaceful modern city of Jianghai City, there is an underground world controlled by the ancient mysterious organization "Yin Pavilion". The members of the Yin Pavilion possess special abilities and guard the fragments of the "Tianji Diagram" that can affect the world order. At the same time, a mysterious force called the "undercurrent" quietly rises, trying to seize the secret map and break the existing balance. Ordinary citizens know nothing about this and are still living ordinary lives. However, a huge crisis is quietly approaching.
