Decades after the aura has been revived, the ancient beasts from the mountains and seas have long since lost their vicious reputation and are hidden among the crowds of modern cities.
Ordinary people can only see the bustling fireworks with their naked eyes, but they cannot see - the neighbors, colleagues in the company, and roadside vendors who live together day and night are all ancient beasts that have lived for thousands of years.
Lin Yan, a social worker who works overtime, was originally an ordinary worker struggling at the bottom of the city, but one night when his ancestral jade pendant was broken into pieces, he awakened to the truth.
The cold-hearted director of the late-night subway turns out to be a nine-tailed celestial fox; the honest old man who repairs the car in the community is a bastard with mountains and rivers on his back; the gentle milk tea clerk on the street turns out to be Lu Shu, an auspicious beast who understands human feelings.
The gentle beast hides in the world, but the ferocious beast takes advantage of the revival of spiritual energy to secretly cause chaos and stir up the undercurrent of the city. The Secret Beast Suppression Department, a secret government organization, secretly maintains stability, and the balance between humans and animals is at stake.
Since then, Lin Yan has wandered on the boundary between humans and strange beasts, observing mountains and seas as a mortal, resolving millennium grievances, and suppressing ferocious beasts in troubled times. When the barriers between the two worlds are broken and the mountains and seas overturn the city, he will eventually become the only observer to maintain the order of the two worlds.
