In the Jing'an Marquis Mansion in the Qinglan Kingdom, the concubine Su Weiwan has lived in the shadow of her aunt and sister since she was a child. Her mother passed away mysteriously, and she was regarded as a helpless orphan, and she was treated with cold eyes and humiliation. In order to find out the cause of her mother's death and protect the only loyal servant around her, she restrained her sharp edges and pretended to be cowardly and incompetent, secretly practicing the art of medicine and poisoning, and studying the magical skills of organs. In an accident, she triggered the jade pendant left by her mother, unlocking clues to the secrets of the previous dynasty, and also led to a murderous disaster. Her aunt's mother's constant pressure, her aunt's sister's frame-up, the family's competing interests, and even the secret competition among the court's forces all pushed her to a desperate situation. Su Weiwan no longer tolerates it, uses medical poison as a blade and resourcefulness as a shield, and works step by step in the deep house compound to expose her aunt's conspiracy, wash away her grievances, conquer people's hearts, and accumulate power. Not only did she have to counterattack in the house fight, but she also had to get involved in the vortex of the court's intrigues, uncovering the shocking secrets behind the secrets of the previous dynasty, and finally transformed from a concubine who depended on others to a legendary woman who controlled her own destiny and influenced the court situation.