Demon history: The Suzaku tribe is good at forging swords and iron, the Xuanwu tribe is good at mechanism construction, the Qinglong tribe is good at raising wood to make medicine, and the White Tiger tribe is good at illusion and astrology. Guarding the southeast, northwest and four directions. Around the birth of "Princess Dove", a confusing legend, strange monsters... The stories hidden in each sword were revealed one by one.