Shen Zhiyi, the legitimate daughter of the Marquis of Jingyuan, was originally a proud daughter of heaven, but due to the early death of her biological mother, she was framed by her stepmother and was demoted to Zhuangzi by her biological father for eight years. A bloody letter summoned her back to Beijing, but what awaited her was a marriage with Xiao Chengyu, the general of Zhenbei - a conspiracy that involved her in the whirlpool of the crown prince and the King of Qin's succession.
Everyone knows that General Xiao Chengyu of Zhenbei is cold-blooded and ruthless in killing people, but they don't know that this powerful official with 300,000 troops is actually the orphan of the late emperor, who has been dormant for many years just for revenge. On their wedding night, he tested her blood with a silver needle, and she defeated him with poisonous powder, and a "trading marriage" with each person's own agenda began.
Shen Zhiyi looks weak on the surface, but is actually an expert in medicine and poisoning. He uses rouge and gouache to control the harem, uses epidemic incidents to bring down powerful officials, and works step by step to expose his stepmother's poisonous schemes. He also secretly controls the power of Jiangnan drug dealers and becomes the mastermind behind the chaos in the court. Xiao Chengyu seemed to be testing each other and fighting each other with swords, but he rode alone to save the beauty when she was in jail, sucked poison from his mouth when she was poisoned and was dying, and even tattooed her portrait on his chest, declaring "This is the flag of the Zhenbei Army."
When Shuo Yue's cold poison broke out, she used a unique antidote to survive; when the secret chamber's edict came to light, he gave up the right to inherit the throne for her. From mutual use to deep love, she helped him put down the rebellion in the northwest, and he protected her and gained power in the palace. In this intertwined game of intrigue and love and hate, the cold-faced general finally becomes a maniac who dotes on his wife, and the dormant legitimate daughter also grasps her own glory and sincerity amidst the turmoil.
