Hunting Ghosts in the Mortal World.

Summary

In this supernatural investigation at an industrial factory, the protagonist and his master interview Uncle Lu, a long-time security guard. Uncle Lu reveals the factory was potentially built on a wild burial ground and shares secondhand supernatural encounters. He mentions a mysterious figure appearing after midnight on rainy days, strange noises near the cafeteria involving clanging stainless steel bowls, and a female cleaning worker's encounter with a black shadow that suddenly disappeared. Despite working there for years, Uncle Lu personally hasn't witnessed many supernatural events, but he confirms the factory has an unsettling atmosphere that makes night shifts terrifying.

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