Lin Ye, a desperate maintenance electrician, signed a strange employment contract from "Threshold Safety Disposal Co., Ltd." In order to raise money for his mother's life-saving surgery. There are no academic qualifications or experience requirements, and the basic salary for a single task starts at 500,000, with no upper limit - and what he has to do is to step into the death realms called "liminal spaces" to deal with out-of-control supernatural anomalies and recover high-risk anomalies.
From the abandoned underground research institute full of resentment to the death amusement park that never closes; from the maze-like and twisted confinement hospital to the haunted house in the wilderness swallowed by darkness. Every mission is a near-death gamble. He needs to rely on his professional knowledge of circuits to carve a way out of a desperate situation, use detectors and psychic boxes to capture abnormal traces, judge the characteristics and weaknesses of dead souls and aberrations, and use salt powder, holy water, and runes to fight against the approaching death. He must also maintain his sanity in the unknown darkness that devours everything, avoid the inevitable outcome in the rule traps with hidden murderous intentions, and face the greed and betrayal of his teammates between life and death.
Behind the sky-high bounties is an endless cycle. The company's secretive origins, the truth about the birth of the liminal space, and the last clues left by countless missing persons are all slowly emerging in the darkness. Here, those who are alone will die, those who make mistakes will not return, and the only criterion is to survive.
Either return alive with the bounty, or remain in the liminal space forever and become the next anomaly to wander.