Lin Wan, the legitimate daughter of a general, was framed by her concubine and her fiancé, and the family was wronged. She was drugged and disfigured, so she married Xiao Jinyuan, the seventh prince who was rumored to be exhausted.
She possesses the unique skills of a poison doctor and vows revenge; he has been pretending to be ill for many years and has a hidden edge. The first confrontation on the wedding night, the two tested each other. When the poisonous doctor meets the fake sick prince, the road to revenge unexpectedly intersects with intrigues. He protects her, and she helps him seize power. This substitutionary marriage will eventually stir up trouble.
