Netherworld Symbiosis World

The world is called the Netherworld Symbiosis World, where humans and spirits and ghosts coexist, forming the basis of the core worldview. Ghosts are divided into two categories and share a unified hierarchy: the uncontracted and uncontrolled wild ghosts are the main villains; the ghost servants are bound and controlled by the Yin people with blood contracts. The levels from low to high are wandering soul level, fierce ghost level, demon ghost level, earth bound level, ghost king level, and the top is Shura Dao. Ghosts are mostly born naturally and almost cannot be artificially created. The Yin people of Shen Ye's lineage are contractors cursed by blood, and most of them are descendants of Shen Ye. During a spiritual disaster a hundred years ago, scholar Shen Ye created a blood contract to save his sister, turning her remaining soul into the first ghost servant, breaking the boundaries between humans and ghosts. Yin people are born as spiritual anchors and can sense ghosts, but are cursed by their blood. They must contract ghost servants to suppress the spiritual energy in their bodies, otherwise they will turn into living corpses. The stronger the ghost servants, the higher the risk of their consciousness being swallowed. The ghost hunter Lu Zhan is a pursuer with a mission of atonement. The ancestor Lu Zhan was a close friend of Shen Ye. Because he failed to prevent the blood contract, his wife and children died from out-of-control ghosts, so he used his own soul to forge a soul-suppressing knife engraved with psychic runes, killing Yin people for generations to atone for his sins. This lineage is divided into two factions: the conservative faction advocates killing all Yin people, and the moderate group recognizes that some Yin people can control ghost servants, and some people even secretly turn into Yin people. There is a hidden fateful bond in the world: the remnant soul of Shen Ye's sister resonates spiritually with the soul-suppressing knife. The Yin people's bloodline will produce a strong reaction when they are close to the soul-suppressing knife. Ghost hunters will also experience abnormalities when holding the knife. The encounter between the Yin people and the ghost hunters is the continuation of a hundred years of grudges in this world.