Lin Ye, an electrician with nowhere else to turn, signed a bizarre employment contract with Threshold Safety Response Co., Ltd. to raise the money for his mother's life-saving surgery. No educational qualifications or experience required. Base pay starts at 500,000 per assignment, with no upper limit. His job was to enter deadly zones known as “Threshold Spaces,” deal with out-of-control supernatural anomalies, and recover high-risk anomalous objects.
From an abandoned underground research facility steeped in the resentment of the drowned to an amusement park of death that never closes; from a labyrinthine, distorted psychiatric hospital to a haunted house in the wilderness swallowed by darkness. Every assignment was a gamble with nine chances out of ten of dying. He had to use his professional knowledge of electrical circuits to carve a way out of desperate situations, track anomalies with detectors and spirit boxes, identify the traits and weaknesses of ghosts and mutated entities, and fight off the ever-encroaching threat of death with salt, holy water, and runes. He also had to hold on to his sanity in the unknown darkness that devoured everything, avoid deadly endings in traps hidden within the rules, and face his teammates' greed and betrayal in the midst of life and death.
Behind the exorbitant rewards lay an endless cycle. The company's carefully concealed origins, the truth behind the birth of the Threshold Spaces, and the final clues left by countless missing people were all slowly emerging from the darkness. Here, anyone left alone would die, anyone who made a mistake would never return, and there was only one rule: survive.
Either return alive with the bounty, or remain forever in a Threshold Space, becoming the next anomaly to wander its halls.
