She could have lived the life of a pampered young lady, but instead she fakes an illness and becomes a constable. She takes the lead in catching criminals and solving cases, but knows next to nothing about the things a young woman is supposed to know. Her second aunt is afraid that she'll become an unmarriageable old maid, and is always trying to set her up on blind dates. Meanwhile, she's busy buddying up with Young Master Qi, a merchant from the capital, introducing him to business opportunities and investigating cases with him. Little does she know that the scoundrel is here to take down the Duke of Qingguo. And now she remembers how she called him a sucker and teased him in a brothel... Forget that for now. He claims he's here to investigate cases, but spends all day hovering around her. It's either one contrived chance encounter after another or him barging in on her blind dates. At this rate, finding a man to marry is harder than being a constable...