Five years after Jordan Sullivan vanished without a trace, her final voicemail remains the only piece of evidence left behind: eleven seconds of static, wind, and a terrified gasp.
While restoring archived police recordings, audio forensic specialist Conrad Murphy uncovers a hidden low-frequency signal buried beneath the noise—something investigators never noticed. Determined to identify its source, he begins a relentless analysis of the recording.
But the deeper he listens, the more the signal seems to follow him beyond the headphones. Sleepless nights turn into obsession. Ordinary sounds become impossible to trust. And the boundary between evidence and hallucination starts to disappear.
Some mysteries are buried in silence. Others are waiting to be heard.