Lin Xiaoyu, the younger brother of college student Lin Xiaoxing, fell into a deep sleep due to an accident, and his consciousness was trapped in the "dream maze". In order to awaken her brother, with the help of Gu Yan, a psychiatrist who studies dreams, she entered a nested fantasy dream. Here, she can control tiny objects to search for clues, but she encounters a mysterious "shadow" that hinders her - it swallows dream fragments, tamperes with the maze path, and attempts to trap Xiaoyu forever. Xiaoxing relies on his courage and ability to control small objects to solve strange levels such as mirror mazes and time loops. With the help of Gu Yan's reality, he gets closer to his brother's consciousness step by step and vows to bring him back from the abyss of dreams.
