When the last ray of starlight extinguished in the foggy city, the coldness of technology and the shadow of magic clashed in the night. Xing Heng, a mechanic who was implanted with otherworldly runes, hid in the underground where steel and spells intertwined, trying to solve the mystery of his father's disappearance. She discovered that the operation of every smart device was accompanied by indescribable whispers, and every flash of magic affected the heartbeat of the city. In the darkness, the boundaries between technology and magic gradually blur. Xingheng must struggle between reason and madness to uncover the terrifying truth hidden deep in circuits and talismans. Her motive is not only to find her relatives, but also to issue a final question to the out-of-control world: When technology swallows magic, who can still maintain humanity? With its chaotic time and space structure, strange puzzles and suffocating atmosphere, this book takes you into a late-night dream from which you cannot wake up.