Psychologist Lin Yimo wakes up trapped in a "horror game" and joins forces with Su Wan'er, an amnesiac martial artist, and Chen Jianguo, a criminal police officer, to survive. They discover that the game feeds on fear and is livestreamed around the world. As they delve deeper, Lin Yimo confronts his family's curse, Su Wan'er's memories awaken along with her abilities, and Chen Jianguo investigates the connection between the game and unsolved cases in the real world. Forced to make choices amid betrayal, labyrinths of memory, and paradoxical rules, they ultimately challenge the source of the game and decide whether to destroy the System or become "Night Watchers" who protect reality.
