The first rule of the night rider: if you smell something rotten, don't knock on the door, look through the peephole first.
My name is Song Shi, and I run takeout restaurants to pay off debts. I have a gift - I can smell monsters disguised as humans. I considered this gift a curse until I was recruited by a mysterious organization. They told me the truth: the glass walls of the office buildings you pass by every day when delivering food are all passages for monsters to enter and leave the world. The delivery riders are the only ones who can spot them.
"Don't open the door, I'm delivering food." - This sentence is the epitaph I wrote for myself.