General Wen Tingzhi was framed by the House Secretary Liu Mingyuan in collusion with Concubine Li Guifei for "collaboration with the enemy and treason". The entire family was executed, but only the daughter Wen Lan was saved by a loyal servant. Two years later, Wen Lan changed his name to "A Lan" and lurked in the capital as a street violinist, vowing to bring justice to his family.
While lurking, she encounters King Jing Gu Changfeng - whose mother Su Wanyi's "sudden death" is suspected of being entangled in the Wen family's unjust case. The two went from testing each other to fighting side by side: Gu Changfeng escorted her with the late emperor's "order to investigate the case" order, while Wen Lan teamed up with her old subordinate Qin Feng and the secret agent Su Pei in the palace to build an investigation network.
They repeatedly encountered dangerous situations: they sneaked into the Liu Mansion to find fragments of letters from collaborators, and found that the handwriting was similar to Su Wanyi's; they disguised themselves as maids and broke into the palace's autumn banquet, and dug out ironclad evidence that Concubine Li and Liu Mingyuan conspired to tamper with the military rations account book and murder Su Wanyi in a secret pavilion of Changle Palace; and even under the pressure of the third prince Gu Chengze (Concubine Li), they risked their lives to protect the old Wen family.
Conflict in the court and conspiracies in the harem are intertwined. Wen Lan takes up the task of revenge and justice with a weak body, while Gu Changfeng breaks through the shackles of the prince to clear the way for her. As Liu Mingyuan destroys evidence, the three princes compete for the throne, and Concubine Li's conspiracy to control the palace gradually comes to light, the Wen family's grievances, the cause of Su Wanyi's death, and royal secrets emerge one by one. This is a contest that uses blood to wash away wrongs and resolve situations with wisdom, and it is also a fight to support each other in the darkness - can Wen Lan and Gu Changfeng break through the web of power and seek justice for the wronged dead? The crimes deep in the palace will eventually face justice.
