The ghosts had been living peacefully in the ghost world. But one day, a burst of digitized sound suddenly rang out from the sky, shattering its tranquility. A few days later, humans began arriving. Since humans had been absent from the ghost world for so long, ghostly missions had stopped evolving, and the ghosts were thrown into a state of panic.
Just then, the protagonist, Ling Yi, appeared and began fighting the humans to protect the ghost world.
