Haunted House.

Summary

In a tense atmosphere, Ning Qiushui and others express concern over blood-stained letters, which limit their communication with the mysterious figures behind the iron door. They suspect a nurse's involvement in a murder case and discuss the unstable nature of No. 6, questioning if he is a decoy. Ning Qiushui decides to send a blood-stained letter to Li Feinan, the deceased's father, instead of No. 6, to gather information. Liu Chengfeng delivers the letter, receiving another in return that mentions the need to check hospital surveillance footage, igniting hope for uncovering the truth.

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