In the late autumn of 2023, a black envelope stained with mold dragged the ancient book restorer Su Yan into the "Jing'an Garden", a strange house of the Republic of China deep in the barren mountains. The copper key is rusty, and the 10 rules of life and death are engraved on the resident's handbook - the corridor that is forbidden to enter at midnight, the copper bell that tangles the hair, and the medical records of the Republic of China that must be copied. Violators will be dragged into the abyss by the shadow. Deadly missions on the 15th day of each month followed one after another. The bones under the stone monument in the backyard and the remains of experiments in the basement gradually revealed the truth that this place was once the Japanese army's "conscious parasitism" experimental base. Su Yan stepped into the whirlpool to find her missing sister, only to find that the curse in the apartment had already been woven into a cycle. Everyone's obsession was a bargaining chip for survival and also a bait for being swallowed.
