Deep in the snowy mountains, an "impossible crime" shocked the whole city: murder in a secret room, no traces in the snow, and a wealthy businessman died mysteriously. Traditional investigative methods are helpless and everyone regards this as an unsolvable mystery. However, this is only the prologue.
When the police station was helpless, Lu Li, a police consultant who was regarded as a "freak", relied on his "extra-dimensional insight" beyond ordinary people's cognition to peel off cocoons from a snowflake, a stream of air, and a subtle tremor, revealing the "air pressure lock" and "invisible poison" created by the murderer using high-tech means. But the real challenge has just begun. The murderer, the paranoid acoustic genius Feng Yuan, has surfaced. He turns revenge into "art" and uses sound waves to control people's hearts, create hallucinations, jump off buildings, and cause death by resonance, and a series of bizarre "sound murders." The entire city will become his deadly "concert hall."
From the "secret words of Solomon's scale" to the strange "rhythm" hidden in the footprints, Lu Li pressed forward step by step, and finally started a silent contest with Feng Yuan in the heart of the city. However, when Feng Yuan was arrested, the strange green light in his pupils and the incomprehensible whisper indicated that this was not a simple personal revenge, but a larger and darker "sound war" was quietly beginning... Can Lu Li uncover the mystery of the "Echoers" organization, stop this silent massacre, and protect the tranquility of the city? Or will he be involved in a sonic crisis that subverts cognition?
Intent: Follow the laws of real physics, no supernatural forces. All seemingly "impossible" cases will eventually be solved with rigorous logic and scientific explanations.