Hidden in the smoke and smoke of the old urban alleys is an injustice that has been gathering dust for decades. Due to the silver lock left by her grandmother before her death, Su Yao was accidentally involved in the secret past - the printing workshop where her grandmother mysteriously disappeared, the strange cause of death of the unknown corpse, Zhao Xiong's murder case, and the deadly "Gui poison". All clues entangled her grandmother's gentle but vague figure. Forensic doctor Shen's test points to the suspicion of her grandmother, and the echo between the symbols in the manuscript and the scratches on the silver lock makes Su Yao fall into a struggle between faith and the truth. The person behind the scenes is spying fiercely, accompanied by her friend Lin Yue, and Shen Yifeng is assisting. Su Yao holds the clues and clears the fog in the light and shadow of the old city, pursuing the truth about osmanthus poison, abandoned old houses and age-old grievances, and living up to her grandmother's instructions to seek justice for those who have been wronged.
This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.
