In order to save his tribe, Xiao Lin was forced to conclude a Yin-Yang contract with his Yin-Yang marriage partner. On his wedding night, he burned the contract in public, which aroused Jiuyou's fury. Lu Zhaoheng was originally a judge of the underworld, but was bound to the human world due to a wrong contract and became Xiao Lin's "husband in a dark marriage". From killing each other to coexisting, the two revealed the truth about the blood sacrifice behind the centuries-old dark marriage - who controls life and death? Who is refining the soul? What Xiao Lin burned was not a contract, but a fig leaf for heaven; what Lu Zhaoheng held was not a judgment pen, but the key to reversing reincarnation. The yin and yang are reversed, and the door of hell is wide open. One of them holds a sword for the living, and the other is a god of death who rebels against fate, walks on the road of blood, and burns the rules of the sky.