The male lead was an ordinary wage earner in the twenty-first century. After working late into the night, he was hit by a car on his way to work and transmigrated to another world. In this realm, demon beasts, immortals, monsters, and humans all mingle, each ruling their own domain. Yet he is merely a young Taoist priest on Qingyun Mountain. With little cultivation, his daily task is to clean Moon Reflection Pavilion, or rather, its study. Standing in the hall, he looks up and sighs: other people transmigrate and get either a golden finger or a harem. Is he destined to be alone for the rest of his life? As he gazes at the roof of Moon Reflection Pavilion, which he cleans every day, a glimmer of light flashes. A copy of The Classic of Mountains and Seas falls right in front of him. He picks up the dust-covered book and gently wipes it clean, muttering, “If only I had the armies of this book at my command, how could the world be in such chaos?” A “Ding!” rings out, followed by a voice: “You have activated the System. Go complete missions to unlock more demon beasts and immortals!”