The protagonist Ji Qing travels to the prehistoric world and becomes the ancestor of humanity, the first human created by Nuwa. However, humanity will soon become sacrifices for the demons to refine the Witch-Slaying Sword. To avert catastrophe, Ji Qing leads humanity in betraying Nuwa and retreating to the prehistoric world. This attracts the attention of various forces, and various crises ensue... Laozi: What!? The human race has retreated, so my chance to become a saint will be postponed indefinitely. Sanqing: Not only yours, but mine has been postponed indefinitely too! The prehistoric world thus enters an age without saints! But after retiring, the ancestor of humanity, Ji Qing, cultivated fervently and achieved sainthood before the Five Saints... The introduction is too short, please move on to the main text, thank you very much! ! !