Lin Xuanzhen never thought that the Kan hexagram he drew in Qingxuanyuan would tear open the secret that had been hidden for twenty years - the inexplicable burning pain in the palm of the hand, the black and blue water coming out of the cracks in the wall, the sudden appearance of the mysterious girl Su Qingxuan, and the broken stone in her hand that matched the pattern of his tiger's mouth, all pointed to the mysterious disappearance of his grandfather Lin Shouxuan that year.
Half of the Pisces Xuanzhen seal is divided into yin and yang, and the Guanbian pulse matches the Qi of synaesthesia, so he has to be involved in a "evil-killing" game that spans two generations. From subduing the water-soaked evil that breeds moisture to tracking down the soul-eating evil that alarmed Qingxuanyuan back then, Lin Xuanzhen gradually understood: Grandpa's "far trip" was a lie, the peace of Qingxuanyuan was an illusion, and the hot feeling in his palm was not only the power to suppress the evil, but also the key to uncovering the truth.
When the traces of the hexagram reflected the faint light of the remaining stone, and when the Xuanzhen curse awakened the sleeping energy, Lin Xuanzhen and Su Qingxuan joined hands to explore the truth behind the disappearance of his grandfather in the Qingxuan courtyard filled with evil spirits, while growing in "enlightenment" - killing evil spirits, realizing the mission of blood inheritance, and the righteous path of the world hidden in the patterns of heaven and earth.