Plot introduction
A group of friends working as house cleaners are doing their jobs in an old bungalow. Later they find out that the bungalow is inhabited by a spirit of vengeance, and all of them will have to pay for their past sins. 一群做房屋清洁工的朋友正在一间旧平房里工作。后来他们发现平房里住着复仇的灵魂，他们所有人都必须为过去的罪孽付出代价。
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