Every time Shen Yan strikes his bronze tuning hammer, he hears the secrets hidden in the dead's voiceprints. That is, until he meets Lin Wan, a half-mechanical girl, and learns that he is the "dual-frequency host" hunted by the Shenghai Organization.
A resonance frequency of 1,907 hertz entwines their fates: the click of a mechanical tailbone in the attic, the sweet tremor of strawberry yogurt from a convenience store, and their erratic heartbeats during their first kiss at the monastery all become weapons in their fight against the Shenghai Organization. When Lin Wan turns into a voiceprint embryo on Changbai Mountain, Shen Yan finally discovers that the resonance core on Level -19 holds the truth about the snowy night of 1998: his mother used her own auditory bone to forge their souls into the Shenghai Organization's key and lock.
The vows at their wedding become the final resonance password, while the Shenghai central hub on the far side of the moon begins to awaken. The arguments, tears, and racing heartbeats dismissed as "static" will become blades that slash through a universe of perfect resonance. When the blood-red words "Ghost Voice" seep from a crack in a voiceprint, Shen Yan clutches Lin Wan's bloodstained silver ring and understands: a true tuner was never a craftsman who calibrated frequencies, but a desperado willing to press play on the noise of love in the rift between two worlds.
