Three thousand years ago, when Dayu controlled the floods, he sealed the ancient ferocious beasts that harmed the human world. However, as time passed, the power of the seal weakened. The "Demon Suppression Division" that guards the seal gradually declines, while the secretly active "All Souls Alliance" attempts to release the monsters to gain power. This is a story about the intertwined fate of ancient mythical beasts and humans.
