At that time, the Dasheng Dynasty was in its decline, and border troubles were frequent. Di Rong invaded the border in the north, and Tubo peeked in the border in the west. The powerful officials in the middle of the court were in power, and the world was not peaceful. Thirty years ago, the "Apocalypse Blood Revolution" destroyed seven of the ten sects and injured three in one night. All the masters of the generation fell. Since then, the martial arts has been divided into the "Nine Central Plains Sects", the "Nanling Scattered Alliance", the "Western Region Sword Sect", the "East China Sea Penglai Island" and the "Mobei Iron Cavalry Alliance", and they are constantly competing with each other. The legendary "Sword Manual of Mountains and Rivers" has reappeared in the world. It is said that those who can obtain it can understand the "Sword Intent of Heaven and Earth", control the righteousness of the universe, and reverse the fate of the country. However, no one has seen its true appearance for a hundred years, and only a prophecy has spread: "When the shadow of the sword comes out, the mountains and rivers move; when the white robe returns, the world is united."