Lin Yu transmigrates into Perfect World and, amid a crisis, encounters Shi Hao, the future Desolate Heaven Emperor, before he has fully risen to power. Astonished by Shi Hao's strength and commanding presence, Lin Yu resolutely decides to follow in his footsteps and become his little brother.
From then on, Lin Yu accompanies Shi Hao on a journey full of challenges and opportunities. They fight across the lands, face attacks from primordial beasts and hunts by evil forces, and explore mysterious ruins in search of precious legacies. Along the way, Lin Yu and Shi Hao develop a deep bond. Shi Hao looks after Lin Yu with great care, and Lin Yu would do anything to protect Shi Hao. Lin Yu also meets the beautiful and clever Su Yao. The two fall in love as they adventure together and grow as a couple.
As Shi Hao rises to prominence, they attract the attention of evil forces from across the land, who join forces to attack them. Lin Yu and Shi Hao lead the forces of justice into one thrilling battle after another. At a crucial moment, Lin Yu even sacrifices himself to protect Shi Hao, only to revive after comprehending a mysterious law and grow far more powerful. In the end, Shi Hao becomes the Desolate Heaven Emperor, reigning supreme through the ages. Lin Yu, too, grows into a top-tier powerhouse, and he and Su Yao continue protecting Perfect World, writing a legend of their own.
