The Origin of Supernatural Objects: All supernatural objects in the world are formed from obsessions and resentment. Places of natural disasters and human calamities, such as demolition ruins, haunted houses, and former battlefields, are breeding grounds for them. Supernatural objects feed on human fear and memories. The more powerful they are, the more human they look, and the better they are at disguising themselves.
The Locksmith System: Locksmiths are people chosen at birth by supernatural locks. These locks are the core magical implements used to suppress supernatural objects. A locksmith and their lock are bound together, sharing life and death: as long as the lock remains, the locksmith lives; if the lock is destroyed, the locksmith dies. Locksmiths can strengthen their locks by suppressing and killing supernatural objects. The stronger the lock, the higher the level of supernatural object it can suppress. At the same time, lock marks gradually spread across the locksmith's body. When the marks cover them completely, locksmith and lock will merge for good. What happens after the merger is unknown.
A rusty brass lock found in the ruins of a demolished building turned out to be a gate connecting the worlds of the living and the dead. The moment its bolt snapped open, dead souls and twisted shadow fiends came pouring in. Lin Mo, an ordinary office worker, was forcibly given the title of "Locksmith." His job wasn't to lock doors and windows, but to suppress the supernatural objects that had broken free of their shackles. But nobody told him that this lock could bind not only fiends, but his own fate as well.
