In the final years of the Great Jing Dynasty, the nation's fortunes collapse and an age of chaos descends in full. The imperial court is a hollow shell, and corrupt officials ruthlessly exploit the common people. Aristocratic families monopolize land and commerce, while cultivation sects hoard the path to immortality, raising barrier after barrier until the lowest ranks of society have no hope of advancement.
Ye Feng's soul crosses into this hellish world, where he starts out as a low-ranking constable in a remote border town, with no connections, resources, or talent. Understanding the law of the jungle that governs chaotic times, he casts aside fame and appearances, follows the principle of keeping a low profile, and patiently bides his time, moving with caution at every step in the hope of staying alive.
In the depths of despair, Ye Feng awakens the heaven-defying [Grind King] talent and unlocks the world's hidden mechanism for pushing proficiency beyond its limits. Other cultivators are constrained by talent and resources, with fixed limits to their realms and bottlenecks that are hard to overcome. But by training day and night and enduring life-or-death trials, he can build up proficiency and break through without limit, perfecting techniques and transforming his physique, free of all cultivation shackles. From then on, he steadily advances while developing at a furious pace, making his way from a small town to the county seat, then to the commandery and the provincial capital. He contends with corrupt officials, aristocratic families, rogue cultivators, and demon forces, striving to break the chains of class and overturn the rules of this chaotic age. In the end, he exposes a shocking conspiracy of darkness from beyond the realms, reaches the pinnacle of the path of grinding, attains supreme celestial mastery, and seals away the world's darkness for ten thousand years.