In a world where the phenomenon of "spiritual levitation" exists, some people can enter a public subconscious space called "Timeless Boundary" in their sleep. The flow of space and time here is abnormal and creates specific scenes based on the visitor's deepest desires. The protagonist Luo Qingyan has been able to passively receive fragments from "Timeless Boundary" due to his strong perception since he was a child. In order to prevent himself from being completely lost, he condensed a perfect "Guardian" image in his mind and has been talking to it for more than ten years. Until one day, this guardian really came out of "Time Without Realm", had a body of flesh and blood, called himself Bai Xiu, and told Luo Qingyan that because his longing was too strong, he had "summoned" a program in "Time Without Realm" into an entity.