Introduction to the Department of Spirits and Monsters: "Ghosts" refers to elves and monsters. The ancients believed that when a country is about to prosper, there must be auspiciousness; when a country is about to fall, there must be monsters. All human affairs or natural disasters occur because people are arrogant, extravagant, and commit too many sins. As a result, ghosts and gods are angry and send spirits and monsters to cause disasters as warnings and punishments. The Spirit Department is the agency that oversees the spirits.