I've been getting mystery takeaways for a week straight.
The only note on the order is: "Don't knock."
I checked the surveillance and only caught the delivery man wearing a helmet putting down his bag and then disappearing. After phone calls, I found out that the order number turned out to be my old number that had been out of service for two years. Cash payment, untraceable.
On the third day, the takeaway appeared directly on the dining table of the locked home.
I installed a camera and captured someone walking through the wall late at night - that face looked exactly like mine.
He calls himself "Shadow" and says that there are monster "replacers" in human skin lurking in the world, and the takeaway is an inhibitor to protect me. But I discovered that he was secretly marking the people around me.
In order to save my corrupted colleagues, I learned to stab the monster in the back of the neck with a dagger. I killed three "replacements," including my former best friend.
In the final showdown, I detonated the energy ball. After the white light passed, all traces of abnormality disappeared, as if the nightmare had never happened.
To this day, that "I" appears again on the street corner, repeating the original gesture to me.
I stood there, looking down the dark alley.
Then, he stepped inside.
