In ancient times, the magical elements of the Mu Continent awakened, and the dragon and beast races evolved into highly intelligent magical civilizations. Then one day, the Shadow's seal was broken. The dark forces, under the control of the consciousness known as Darkness, rampaged across the ancient world until civilization fell and magic faded. The last four gods of the Mu Continent gave everything to suppress Darkness, then reforged the world with their own bodies: the sun, the moon, the oceans, and the earth. Yet the remnants of Darkness's consciousness did not vanish. They still lingered in the world, awaiting a chance to turn the tables.
The ages passed, winding through the graveyard of ancient civilization as the planet continued to evolve. At the call of a handful of people with a conscience, the surviving animals gathered in a "protected zone" at the center of the continent. Like their ancestors in ancient times, the animals once again unlocked their intelligence and human forms, establishing their own governments throughout the protected zone: the Wolf Kingdom, the Tiger Tribe, the Lion Tribe, the Jackal Tribe, the Fox Tribe, the Badger Tribe, the Bear Tribe... The age of living beings had begun once more.
But as time went on, magical elements grew active, and the four elemental quartz stones containing the power of the ancient gods appeared once more, sparking the greed and rivalry of the great powers. Darkness's power gradually awakened as well, and it began seeking agents throughout the world... What upheaval will the ancient forces of magic unleash upon the modern world?