In a wasteland world after the cataclysm, the essence of supernatural power is "the overflow of mental frequencies." Those with strong wills can "project" the images in their minds into reality, but the price is being gradually devoured by their own obsessions, until they become uncontrolled "Echoes." Gu Wensheng's mental ability is "Noise Reduction": he can absorb the mental frequencies that spill uncontrollably from others and turn them into his own power, while briefly restoring their clarity. This ability makes him the only person in the wasteland who can "hear" the truth about civilization.