Lin Qi, a maintenance worker in Area F of the underground city, suffered what the official claimed was an "accidental rampage" after injecting a fleet of "divine skeleton" nano-repair machines that had been leaked from the black market. But he tore out a piece of the truth from the black box data: this was the Bureau of Order's remote elimination program for experimental subjects. Carrying the underlying authority chip of the "Charon" space-time anchor prototype, he must find Chen Mo in the abandoned laboratory in Area E-3 before the nanomachine swarm completely engulfs him. Behind the twelve-minute countdown lies the secret of the "Great Silence" incident twenty years ago, as well as a space-time conspiracy that is enough to subvert the power structure of the dungeon. When the roar of the mechanical cutting machine sounded overhead, the real hunting had just begun.