She is the sharpest knife in Wuji Pavilion, codenamed Yulan.
Ten years ago, she accidentally left her parents. Fortunately, her master took her in. He hated her parents for ten years. Ten years later, her biological father stood in front of her as a Korean princess - it turned out that she was not an abandoned daughter who was sold, but a lost pawn in a power struggle.
On the day Chen Yu returned to the Duke's Mansion, the imperial edict arrived at the same time, granting the title of Lord of Taiping County, and the whole court was in an uproar. Some people say that the Holy Emperor took pity on the loyal ministers, while others said that it was to balance the growing power of Dongchang and Jinyiwei - the newly appointed county head happened to be the legitimate daughter of the pure minister Chen Shouzheng.
Three forces converged in front of the Duke's Mansion: Jinyiwei wanted to investigate her, Dongchang wanted to use her, and her Chunchen father just wanted to protect her. But Chen Yu has been on the edge of a knife for ten years. What she knows best is not killing people, but how to transform herself from a chess piece into a chess player in a murderous chess game.