Nightmare demons are born from the dark side of the world. Fourteen years ago, a nightmare demon named Ya caused irreparable damage to the Snow Spirit City, leading to the deaths of countless tribesmen. Fourteen years later, a boy named Bai Ya encounters an invasion by a mysterious nightmare demon. After experiencing numerous crises and battles, Bai Ya continues to grow and embarks on an adventurous journey full of danger and excitement, exploring unknown worlds.