Tracking the Secret Bunker: Whispers of Demon Copper

In the leaden-gray Fortress City, Sun Mao and the others live like numb puppets, passively undergoing “calibration” every day. Then a revolt shatters the silence and awakens his consciousness. In a moment of peril, he discovers a strange piece of “demon copper” in his pocket. It not only drives away the force eroding his mind, but also points the way to spiritual awakening. From that moment on, Sun Mao sets out to escape his prison.