In the cold ancestral hall deep within the inner court, Xiao Mingyue, the illegitimate daughter of the Duke of Zhenguo's household, holds the half of a jade token her birth mother left behind. Little does she know that it is a fragment of the “Mountains and Rivers Command,” an artifact capable of stirring the world. Her mother's early death and her stepmother's cruelty never dulled her edge. Instead, they forged in her the resolve to control the board amid the treacherous currents of fate.
When she first enters the martial world, her unparalleled mastery of medicine and poison helps her navigate the Tianji Pavilion's power struggles, where she allies with Ye Qingxuan, the young master of the Medicine King Valley, and Chu Yao of the Qianji Sect. In the imperial court, she confronts meddling relatives of the imperial family and factional strife. With a bloodstained letter from the frontier, she tears away the conservatives' hypocritical facade and pushes through sweeping reforms. When the Canglang cavalry tramples across the border, she dons her armor and uses the Mountains and Rivers Command to summon the phantom of the Black Armor Heavenly Army, turning conflict into peace. Faced with suspicion from the throne, she willingly relinquishes power while secretly weaving an intelligence network, snuffing out schemes before they can take shape.
From an unwanted daughter in the inner chambers to a sovereign who safeguards the realm, Xiao Mingyue advances step by step through political intrigue and the fires of war. She thwarts her stepmother's schemes, unravels the Dark Alliance's chain of murderous plots, and, amid the upheaval in heaven and earth triggered by the Mountains and Rivers Command, uncovers the ultimate secrets of the dynasty's dragon veins and the flow of spiritual energy. Without a male lead to protect her, she uses the land as her game board and wisdom as her blade, writing a legend in the turbulent Great Yu Dynasty: “The realm belongs to all. Why should it need an emperor?”