Reborn as the weakest little black snake on the ocean floor, he activates a devouring evolution system. He grows stronger and evolves by devouring sea beasts, rescues his injured Dragon Mother, and leads his older brother and sister in protecting their dragon lair. When a powerful enemy, the Abyssal Jiaolong, attacks, his mother is gravely wounded and sacrifices her true dragon essence to help him transform. The protagonist evolves into a nine-clawed golden dragon, slays his nemesis, heals his family, and leads the dragon clan toward the vast primordial worlds to embark on a new journey.