Yuyuan City experienced a strange disaster (called ectoplasmosis) 10 years ago. In this disaster, almost most of the citizens died. Yuyuan City entered a period of silence. The surviving citizens were divided into two parts. The first part chose to hide the truth and live an ordinary life when Yuyuan City was reborn. The other part is to clean up those alien parasites in the darkness of the city to prevent the recurrence of disasters. This organization is called [Rebirth]. The video after the rebirth completely forgot this part. Many people call them killers. Of course, there are very few people who encounter them. Some people think this is just a legend...
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