Su Jinli, a modern forensic doctor, travels back in time to become an unpopular concubine in ancient times. At the beginning, she falls into a life-or-death crisis when she is falsely accused of poisoning an old lady. She successfully rescued herself by relying on her professional knowledge of toxicology, and discovered that there was another hidden reason behind the death of the original owner and her biological mother, and that the man behind the scenes was directed at the powerful second lady Liu.
In order to survive and take revenge, Su Jinli overcame the cowardice of the original owner and used modern knowledge to make a living in the mansion step by step: improving the powder formula to gain economic initiative, forming an alliance with his concubine who was also suppressed, and taking advantage of the family banquet conspiracy. In the process, she met Xiao Che, the seventh prince who was pretending to be sick and weak. The two formed an alliance due to their common enemy (the noble clan group) and similar situation (secret plotting). From mutual testing and exchange of interests, they developed into spiritual confidants.
As the investigation deepened, Su Jinli not only uncovered the truth about her mother's poisoning, but also discovered the indifference and sacrifice her father had chosen for the benefit of the family. After overthrowing the Liu family, she was completely disappointed with the entire decadent family. In the end, she used her father's political leverage as a bargaining chip to make a shocking deal with her father, giving up everything in exchange for her freedom, and successfully escaped from the Su Mansion.
Su Jinli, who gained her freedom, started a new life as an independent female householder, and continued to use her expertise to fight side by side with Xiao Che, who had become a rising star in the political arena, to solve the royal family's reserve crisis. At the end of the story, the Su family fell and the world was finally settled. Su Jinli chose to leave the south of the Yangtze River, while Xiao Che gave up his power and followed him. At a new starting point in life, the two ushered in a future that truly belonged to them and was full of infinite possibilities.
