Between Heaven and Earth, there was once a Sky Rift.
It was not a wall, but a barrier of perception that kept the human world and the otherworld from seeing one another. The ancient line of boundary wardens maintained it for generations, enduring the passage of countless eras as a punishment of immortality.
Until modern times, when no one remained to guard it.
The Sky Rift began to thin. The otherworld's "spectral mist" seeped into the human world through the thinnest parts of the abyss. It was not mist, but rules in liquid form. Wherever it fell, it rewrote the city: cause and effect could be tampered with, memories overwritten, and the living rewritten into "specters," half human and half rule.
Shen Yanzhi was the last boundary warden before the age of dwindling magic to willingly enter a long sleep. When he awoke, ten thousand years had passed in the human world.
He makes no grand claims, makes no wishes, and draws no sword. He does only one thing: understand the rules, then unravel them.
With the Seven Laws within him and immortality as his debt, what he must protect is not one city or one place, but the light that people in this world are still willing to guard for themselves.