The warmth of spring in the south of the Yangtze River makes everything possible overnight. She is the legitimate daughter of the Lin family, who was crowned the most talented in Jinling. However, her family was ruined due to the water transport case, and she became the most humble concubine in the Eastern Palace as a result of the crime. He is a prince who is walking on thin ice, his sacred heart has fallen by the wayside, and he is forced to accept this "abandoned son" thrown in by his father.
The deep palace is like the sea, and the red walls are like prison. She was willing to be a silent shadow, but in the middle of the night she received the blood evidence sent by her old servant. He looked on coldly, but put down a book on water transportation and border defense on her desk. From being wary of each other to secretly communicating songs, in the Qingdeng ancient scrolls, she glimpsed the shocking conspiracy behind Tan Mo that implicated the Ministry of War and destabilized the border; in the thick of fog, he made a plan and turned her into a sharp knife that pierced the darkness.
During the plum appreciation banquet, poems were used to express one's ambitions, and at night in the palace, paintings were used to illustrate events. When the blood-stained private book points directly to the side of the dragon throne, and when the border war is reignited due to the corruption of the court, can this couple who started their calculations work together to break the situation in the huge waves?
The daughter of a cold and forbearing prince × a tenacious criminal minister, from a political marriage to a life-or-death relationship. In the deep palace intrigues, the family, the country, and the world, love and hate burn together in the abyss.