At the beginning of the story, Shen Mo inhaled excessive smoke during a forest fire rescue and was comatose for three days and three nights. After waking up, he found that he had acquired an unusual ability - "super-distance hearing": in a quiet environment, he could actively focus his hearing to any location within a radius of 500 meters and hear the conversations taking place there; in a noisy environment, this ability would be greatly attenuated, but occasionally "information fragments" would passively flow into his ears.
