The Mysterious Resurrection of the Eighth Man

My name is Lu Jiutian, and I traveled to the world of "Mysterious Resurrection" and became a supernatural courier. There is no golden finger, no system, only a ghost phone that releases tasks, and a piece of human skin that predicts. My first task is to return the human skin paper to its original owner - Fang Jing, who is destined to be submerged in the Knocker incident. My second task was to put down another express box and witness with my own eyes the old man knocking on the door slowly walking towards me. I thought I was just a bystander, watching their development and carefully advancing the plot, until I discovered that the eighth person who came out of the incident had no name or description. That person is me. It turns out that from the moment I took over the first express delivery, I was already in the game.