In the depths of Zhongnan Mountain in the Age of Dharma, intern Su Mingzhao triggered the "Hunyuan Jade Book" that had been sealed for six decades in the collapsed ancient temple, awakening the memory of nine generations of reincarnation. When he discovered that the yin-yang fish jade pendant passed down from his family was actually a container of the innate Tao species, it had become the "Tiandao variable" pursued by Tianji Pavilion. The mysterious girl Lu Qing appears with a jade pendant that reverses yin and yang, leading him to embark on the road to enlightenment by hanging from the underworld and bravely entering Penglai. Little does he know that the two of them have been woven into a 129,600-year-old calamity chess game - the cause and effect between Si Chenxingjun and the laurel tree spirit, the god-killing prophecy on the jade sign in the Siming Palace, and the restless ancestral witch spirits in the bronze coffin, all point to the ultimate truth that the Battle of the Gods has been tampered with.