The story takes place in the vast wilderness of Dongzhou in the realm of mountains and seas. The protagonist, Sun Sicong, was originally a low-level scribe in the "Langhuan Pavilion" in the fairy world. Because he accidentally glimpsed the broken pages of "Gui Xu Lu" which records the forbidden knowledge about the origin of the universe, he was ruled as a "cognitive polluter". His immortal bones were broken, his memory was erased, and he was thrown into reincarnation. However, a trace of "cognitive imprint" from "Gui Xu Lu" protected his true spirit, allowing him to be reborn as the son of the librarian of a small country in Dongzhou with broken memories and a huge knowledge base. Relying on the intuition of the knowledge system in his previous life, he reversely deduced the foundation-building method "Sun Moon Zhao Zhao Jue" from the vast sea of mortal classics suitable for the current body, and embarked on a unique path of "cognitive cultivation of immortality". He met Lu Mingxin, a casual cultivator who firmly believed in "the unity of all dharma", and also met Situ Xuan, the chief religious inquisitor who regarded all unorthodox immortal ways as heretics and wanted to purify all "cognitive deviations". While exploring Guixu in the South China Sea to find fragments of memories from his past life, he even came into contact with his old enemy who was "destined to conflict with each other" - Jiang Chengying, the destiny's son in the western realm of Kunlun. Sun Sicong gradually discovered that his rebirth and the scattering of "Gui Xu Lu" involved shocking secrets about the reincarnation of the universe, the boundaries of cognition and even the erosion of "nothingness". In the end, he did not prove the Tao with force, but reconstructed the connection between himself and the world with "cognition". In the depths of Guixu, he used knowledge as a pen to rewrite some of the rules and found a unique path between "existence" and "nothingness" - becoming the "Guixu Keeper" who guards the possibility of multiple cognitions.
