Twelve years ago, the Lin family was framed and fell. The young master Lin Chen was divorced and fell into a river. After accidentally entering the Kunlun secret realm, he practiced hard and became the supreme master. Twelve years later, he returned with the Kunlun secrets and vowed to repay the blood debt from the Su family, Zhao family and the Black Snake Society. On the road to revenge, he discovers that behind the family's downfall there are shocking secrets about the earth's veins, boundary monuments and ancient ferocious beasts, and it also involves the thousand-year conspiracy of the Qin family in the capital. From the open and secret fights in Jiangcheng to the final battle in Kunlun's secret realm, Lin Chen uses black iron as his blade and ice as his armor. While guarding the balance of the earth and uncovering the mystery of his life experience, he continues to write a supreme legend of gods killing gods and Buddhas killing Buddhas. The mysterious text message from his father and the cracks in the passage between the two worlds indicate that this battle of protection across the mortal world and the secret realm is far from over.