Elias reports the anomaly to his superior, DIRECTOR KRELL , a cold, calculating bureaucrat. Krell dismisses it as pipe resonance and orders Elias to scrub the audio file. But Elias, a perfectionist, keeps a copy to analyze further.
During a routine sweep of Sector 4 (the oldest part of the city), Elias picks up a signal that shouldn't exist. It’s not a mechanical leak or a rebel shouting. It is a low, resonant hum—a subsonic frequency vibrating beneath the foundation of the city. idm 621