Suiyang is a city too beautiful to hold corpses. But every city holds corpses, and in the twenty days before its famous Festival of a Thousand Lanterns, seven people have died in exactly the same way.
Investigator Ding Chuan came to Suiyang for the wine. He never meant to stay this long. But when a cloth merchant asks him to look into seven sudden deaths that the city magistrate has dismissed as coincidence, Ding Chuan finds a pattern too precise to ignore.
Every victim worked on the festival. Every death looked peaceful. And beneath the city's oldest warehouse lies a locked door that has not been opened in two hundred years.
What Ding Chuan uncovers is a covenant older than the city itself, a hidden network of guardians sworn to keep something asleep beneath Suiyang's streets, and a poison so patient it has waited two centuries to be used. As the festival draws closer and the lanterns begin to rise, Ding Chuan must decide who among the living can still be trusted, and what price must be paid to keep an old secret from waking for good.
The Patient Poison is the third novel in the Ding Chuan wuxia mystery series, a story of quiet investigation, old debts, and the kind of silence that only grows louder the longer it is kept.