Before the execution knife fell, the mute girl Shen Deng heard Foxtail, who had been dead for three days, say in her ear:
"This knife will kill your mother first."
She called out the name of the missing girl for the fox demon, solved her own death case on the spot, and heard the last words left by the demon.
But the last words may not be the truth.
Fox demons can lie, and evil people can also harbor injustices. Shen Deng must find the truth from the lies of corpses, old objects and living people. Every time she solves a demon case, she can leave behind a magic spell: borrowing voices, remembering, finding names, falling into dreams... The mute girl who was once used as a sacrifice has gradually become a being that makes the Monster Suppressor fearful.
Until she saw her name on the dead book twenty years ago.
And those dead demons have been waiting for her to speak.