Chen Mo, a 30-year-old unemployed programmer, responded to a mysterious text message in desperation and was actually involved in a world of strange rules and strange stories called "Tiandao Co., Ltd." Together with other strange survivors, he must strictly abide by unknown rules in an infinitely extending "lost corridor" full of death traps, remain still at the terrifying moment when the lights go out, and look for a safe house and exit. Faced with the death threat that may be "cleared" at any time, Chen Mo must rely on his calm mind and observation skills to struggle to survive in a desperate situation and uncover the truth behind this strange world that interweaves reality and terror.