On a moonlit night, scholar Ning Caichen stumbles upon a bone in the haunted Black Mountain Forest—and meets the ghostly fox spirit Nie Xiaoqian. Hunted by her, he flees into Lanruo Monastery with a dying imperial guard, who entrusts him with a blood-stained scroll for Commander Zhuge Jing.
With the help of demon hunter Yan Chixia and rogue disciple Zhiqiuyiye, Ning delivers the scroll—only to be thrown into prison. To earn freedom, he must find the guard’s corpse. But when the painting of a breathtaking woman floats into his cell, he realizes: the real danger isn’t the prison… but the fox spirit watching him from the shadows.