I picked up a piece of debris on the side of the road and thought it was thrown away by someone. Engraved on the back was a line of text: "The entrance to Level 0 is not on the public floor. The voucher is somewhere else." Three days later, I found myself being followed, and someone had walked that path before me. When I learned that the entrance to the underground space resets every seventy-two hours, someone had already entered before me.
