In the deep palace, the red walls are towering, blocking out the skylight and imprisoning the fate of countless women. Shen Jinghong, a third-grade virtuous concubine, was originally the daughter of a hero who assisted the new emperor in enthroning the throne. However, when Concubine Xian gave birth to a prince, she was framed for murdering the emperor's heir. She was instantly imprisoned and thrown into the cold palace. The pain of the broken finger has not gone away, and the family crisis has arrived - his father Shen Yi is accused of treason and treason, and the entire Shen family is in danger.
From the bloodshed of the Criminal Division to the intrigues of the cold palace, from the intrigues in the harem to the war at the border, Shen Jinghong relies on the poison identification and self-defense skills taught by his father to survive step by step in desperate situations. She discovered that Concubine Xian had a false pregnancy and the shocking conspiracy of the Queen Mother colluding with her relatives, which also involved old accounts of the Mu family's injustice many years ago. A dagger engraved with half a peony and a bronze mirror hiding secrets have become her key to connecting loyal and good people and tearing open the fog.
When the undercurrent within the palace wall surges into the border battlefield, and when the most trusted person around him bares his fangs, Shen Jinghong sheds his luster, uses flesh and blood as a blade, and wisdom as a shield, not only to wash away the family's grievances, but also to make all the dark hands pay the price. The red wall crumbles and the jade cracks. Her journey of revenge is also a battle between loyalty and betrayal, survival and morality.