Neighborhood rumors were flying everywhere, with gossip that Lin Mo danced late at night and made noise. Neighbors came to the door to verify, only to find out that Lin Mo's legs were amputated, making normal walking completely impossible. When the atmosphere inside the house became quiet, an inexplicable sound came from upstairs. Everyone searched around everywhere, and only found a black cat wearing claw covers, so they did not investigate any further. After a few days, the strange sound came again. Lin Mo felt suspicious, and operated a drone to explore the apartment upstairs, accidentally discovering that a black coffin was hidden inside the room. Numerous abnormal signs were linked to each other, and under the shroud of layers of mist, a deliberately concealed secret past was slowly revealing its truth.