In a world where sound is a state-regulated currency and every word is taxed via neck collars, a "Banger" named Cass and her partner Silas scavenge for illegal noise. They discover a pure 440 Hertz note that they use to hijack the city's power grid, turning the infrastructure into a massive speaker. Their rebellion evolves from a localized broadcast into a planetary resonance called The Hum, a natural frequency that shatters the Ministry’s sensors and restores the public's voice. Ultimately, they trade their mechanical amplifiers for the earth’s own heartbeat, ending the era of silence.
