The story takes place at the end of the "Great Dream Era", when cultivation civilization withered due to an unknown disaster, and the dream dimension began to erode reality. The protagonist Bao Xianlun, a ninety-five-year-old former chief engineer of a doomsday shelter, discovered his rare "dream-building spiritual root" in the ruins of civilization by the "Xuanjing Mountain", a surviving sect of the "Sentence Sect". With his old age and the rigorous logic and systematic thinking of an engineer, he began to practice the miraculous skill "Zhou Tian Awakening Dream Art" and embarked on a unique path to immortality. During his practice, he met "Su Yan", a genius girl from the worldly sect who had different ideas but was both an enemy and a friend. He accidentally triggered the "time and space cycle mirror" and attracted the "other self" from the future who claimed to prevent him from making a big mistake. Bao Xianlun used infrastructure technology to try to rebuild a stable cultivation community "Xingmengfang City" in the lost city of dreams. However, this move intensified the contradiction between the traditional worldly sect and the radical worldly sect, and also attracted various forces who coveted the "Eternal Reincarnation Cauldron". He dealt with the conflict of ideas, the paradox of time and space, and the dangers of dreams. In the end, he did not prove the Tao with force, but with the practice of "making dreams come true." In the "sea of lucidity", he found a third way to connect all dreams and reconcile Tao disputes - the "Path of Practice", and found new possibilities for the broken cultivation civilization. ",