Li Chuan is an adventurer who focuses on solving fantasy puzzles. He was involved in a different space called "Sleep Abyss" during an out-of-control dream experiment. The night here seems endless, nightmare creatures feed on memories and fears, and every corner lurks the trauma that Li Chuan has never faced in the past. He must distinguish the true from the false and find a way to return as the boundary between dreams and reality gradually blurs. However, Mianyuan is not a simple prison. It will induce Li Chuan to constantly examine himself and even weave new illusions with his most precious beliefs. Li Chuan's motive is not only to escape, but also to uncover the connection between this space and the depths of his soul. He discovered that every time he confronted the nightmare, part of the real world disappeared. The highlight of the story is that dream puzzles and psychological trauma are intertwined, and the horror atmosphere and philosophical speculation coexist. Readers will follow Li Chuan into the lost path and experience the ultimate horror of memory dissolution and identity reshaping. Deep in the abyss of sleep, the real enemy may never be outside, but hidden deep in Li Chuan's heart.