After waking up, You Xinyu discovers that he's been reborn in the vast forests of the Changbai Mountains as a black bear cub only recently born.
Bitter winds drive snow against his fluffy fur. His frail body can barely stand, and the roars of tigers and wolves ring out all around him. Every sound makes his heart tighten. In this primeval forest where the weak are prey, survival becomes his only goal.
Just as he's on the brink of despair, the [Primordial Evolution System] suddenly activates. Nibbling his first berry triggers “Basic Foraging” and slightly improves his physique. Evading a wolf's pursuit unlocks the “Quick Dodge” skill. Even hibernation lets him accumulate “Evolution Points” to exchange for defensive talents. With the System's help, he grows from a helpless cub who can't get his share of the food into a massive black bear strong enough to flip a wild boar on his own. His paws grow ever more powerful, and his fur gradually takes on a dark golden sheen.
Meanwhile, “geomagnetic anomalies” quietly begin occurring around the world. Spiritual qi, dormant for billions of years, starts to revive. Ancient insect eggs buried deep underground hatch, unknown creatures emerge from the depths of the ocean, and gigantic beasts far beyond anything people thought possible appear across the globe. North America is torn apart by armies of giant crocodiles, the European plains become hunting grounds for werewolf packs, and the defenses of human civilization crumble one after another.
When an army of mutated beasts, made up of giant lizards and venomous scorpions, bears down on the borders of Great Xia, it comes to a halt at the foot of the Changbai Mountains. Amid the blinding snowstorm, a dark golden black bear nearly ten meters tall stands proudly. One swing of his paw smashes the skull of the leading giant lizard, and his earthshaking roar resounds across the land: “This is Great Xia's territory. Who gave you the right to set foot here?”