His name is Ji Yan. After the decline of the aristocratic family, a ray of reincarnation power from Jiuyou was sealed in his body.
Her name is Ji Yao, and she is the sister he protects to the death. She was born with no pulse, and only a ray of innate yang energy maintains her fragile life.
Living in seclusion in Qingya for five years, the brother and sister depended on each other. Ji Yan cultivated the spiritual fields during the day, and used his meager spiritual power to warm and nourish his sister's meridians every night, hoping that she could live just one more day.
Until that day, an ancient jade slip was unearthed from the soil, causing strange phenomena in the world.
When yin and yang first meet, reincarnation begins. The yin-cold power in Ji Yan's body and Ji Yao's innate yang energy blended and coexisted at this moment. From then on, her life was his life; his calamity was her calamity.
At the same time, the ancient secret realm "Xuanhuang Realm" that had been dormant for thousands of years was born ahead of schedule. Five-colored light pillars rose into the sky, alarming all the major forces in the ancient world - Tianshu Pavilion, Fentian Valley, Ten Thousand Demon Cave... Countless monks swarmed in, coveting the opportunities in the secret realm.
What they didn't know was that the opening of the Xuanhuang Realm was closely related to the brother and sister.
An old voice echoed deep in Ji Yan's soul: "Descendants of the Ji family, come..."
But what comes is more than just a summons.
Someone is trying to find out their whereabouts. That ruined surname Ji, that taboo surname, is leading to the monstrous cause and effect little by little to this helpless brother and sister.
How can a young man at the third level of Qi refining and a young girl without the strength to tie a chicken survive in this troubled world?
He has only one way——
Step into the mysterious and yellow world and find the eternal answer.
Even if the road ahead is a mountain of corpses and a sea of blood, even if the entire prehistoric world is the enemy.
Just because he once made a promise:
