Weird Story About Rules: Grandpa Is a Night Traveler

This is a group of people who wander around at night, like lonely ghosts. It is precisely because of this group of people that we can travel safely at night. My name is Gu Fan. Growing up, my grandfather told me that you may not believe in some things, but you must remain in awe. The existence of all things is reasonable. I didn't believe it before, until one day, one night, I saw with my own eyes a fat man weighing more than 200 pounds, holding a mahogany sword, which looked like a golden light with special effects on, killing a shadow-like thing. At this time, I realized that what my grandfather told me since I was a child was not unreasonable.