Ten years ago, Hou Yun's family in Zhenbei was falsely accused of treason and everyone was executed. Only the young girl Yun Jinse managed to escape with the help of young Xiao Yu. Ten years later, Jinse transformed into a "fallen doctor" and sneaked into the capital, dealing with the imperial power and various forces, vowing to kill his enemies with his own hands.
She originally thought that Xiao Yu had betrayed him long ago and had become the enemy's hawk, so she listed him as the first stumbling block to revenge. Little did they know, Xiao Yu was also burdened with a blood feud. He lurked beside the emperor, serving as the chief minister, in order to disintegrate the entire dynasty from within.
In the whirlpool of the court and the rivers and lakes, the two launched an ultimate battle of wits and emotions. From being each other's chess players to playing chess side by side, they jointly weaved a large web that destroyed the imperial power. When the truth is revealed, they face not only a common enemy, but also the ultimate choice between family and country hatred and personal emotions.
