The story takes place in a vast world with beast control as its core - Tianyuan World. Humans gain power by signing contracts with various phantom beasts, and powerful beastmasters are revered. The world contains multiple continents and countless secret realms. The main forces include the Donghuang Federation of the human race that advocates harmonious symbiosis, the Mechanical God Kingdom that carries out mechanical transformation, and the taboo force Abyss that attempts to devour everything.
