Before the chaos began, Hong Yuan accidentally traveled through time and became Pangu's younger brother. He was favored by the system and the Dao, and held treasures such as the Chaos Bead and the World-Destroying Mill. He helped Pangu create the world, witnessed the birth of the prehistoric era, and accepted the Sanqing and the Twelve Ancestral Witches as his juniors. After that, he traveled around the prehistoric world, befriended Yang Mei, Luo Hu and other chaotic demon gods, preached and taught disciples in the Hongyuan Hall, broke through the shackles of cultivation with multiple laws, and wrote his own supreme legend in the prehistoric world.