A cataclysm of supreme darkness descended, as eerie domains from beyond the world swallowed up the defiled realm. Orthodox cultivation vanished completely. The uncanny ran rampant through the human world, and ordinary people struggled to survive amid disaster.
There was no longer any righteous path to the light. The only way forward was the dark cultivation of using the uncanny to control the uncanny, and every ounce of power came at the cost of memory, humanity, and the soul.
The orphan Shen Yan witnessed his village being devoured by the uncanny. Bearing the incomplete Twelve Soul-Suppressing Uncanny Needles, he struggled to survive at the bottom of the Defiled Uncanny Bureau. The primordial uncanny thought lurking within him gnawed at his soul day and night, while those in power were hypocritical and ruthless, and uncanny creatures watched him from every side.
He walked along the brink of corruption, guarding the last remnants of his humanity as he pursued the truth behind an old case through the uncanny fog. As the secrets of the unorthodox arts and the origins of the cataclysm gradually came to light, he would ultimately have to choose between becoming utterly corrupted and using himself to suppress the uncanny, forging a path of redemption through dark cultivation.