Yun Zhao is the daughter of the deposed crown princess. She lives in seclusion in another courtyard and watches the world with a cold eye. The situation in the Dayin Dynasty was in turmoil, and the princes were secretly surging, but she was sent to the palace of Zhenbei King Xiao Jingheng by an imperial edict. He was as arrogant as frost and refused to marry her. Little did he know that she understood medicine, understood astrology, and had a sharp edge hidden in the still water. The palace is surrounded by intrigues, accounts are in deficit, border reports are urgent, and palace secrets are coming one after another. She used spices to convey messages, rely on ancient books to solve problems, and plant medicines and make incense to turn things around. On the surface, he treats her coldly, but in fact, he is secretly protective. From rejection of marriage to conspiracy, a chess game about trust and protection quietly unfolds. Watch how the daughter of a deposed concubine uses stillness to control the situation and share the power of the arrogant prince.