During the Dayin Dynasty, the literary style was at its peak, but there was also an undercurrent. Under the iron law that women are not allowed to enter the officialdom, the extremely intelligent Ling Yuexi became a high school beauty under the name of men's "Ling Yan" and became a secret scenery in the court. With her photographic memory and insight into people's minds, she joined the "Yinyuan Pavilion" that specializes in handling strange cases and secrets for the royal family. Little did she know that she was stepping into a huge whirlpool intertwined with imperial power struggles, Jianghu secrets and millennium legends.
Her immediate boss, Mo Chenyuan, the master of Yinyuan Pavilion, appears to be a cold, taciturn and ruthless powerful official, but in fact he is burdened with an unknown family mission and the mystery of his life experience. The two became connected due to a bizarre "Ancient Mirror Soul-Eating Case". They tested each other, became enemies and friends, and in the process of investigating mysterious cases again and again (such as the blood jade curse, nursery rhyme murder, mirage mystery, etc.), They gradually uncovered each other's disguise and discovered each other's hidden tenderness and pain.
As the investigation deepens, Ling Yuexi's female identity is in danger, and Mo Chenyuan's secret is gradually exposed - their fate is actually closely connected with a lost ancient document "Jiuzhou Strange News" and a mysterious organization "Qianji Tower" that can overthrow the dynasty. When the pieces of the truth are pieced together one by one, they not only have to face the open and secret arrows of the court and the swords and shadows of the rivers and lakes, but also have to make a choice between personal emotions and the justice of the world. Yue Ying is ups and downs, and the depths are unpredictable. Is the joining hands of the "Tanghua Lang" and the "Cold-faced Pavilion Master" the key to breaking the situation, or is it the beginning of falling into a deeper confusion?