In Chang'an, the prosperous Tang Dynasty, music could communicate with ghosts and gods, and it could also kill people invisible.
Shen Huiyin, a blind female official in Sitiantai, has used her ears instead of her eyes since she was a child, and she can distinguish the subtleties of the sounds of heaven and earth. When important ministers and Hu Shang died suddenly in strange manners one after another, leaving unnatural "voiceprint reverberations" around their bodies, she was drawn into the center of the whirlpool.
To solve the case, you need to use your ear as your blade: from the fatal frequency hidden in "The Song of Colorful Feathers" to the tampered code in the royal festival music; from the secret technique of using the resonance of chimes to control people's hearts, to the huge political conspiracy woven with pipa music scores.
She will discover that all the cases point to a silent coup that attempts to use "righteousness" to tamper with the destiny and overthrow the dynasty. The only thing that can prevent this disaster is a music officer who cannot see the world, and her inner rhythm that no one can hear, and which resists the torrent of the entire era.
