Shen Heng married into the Cui family as a stepmother, thinking that she would be able to live a stable life. Unexpectedly, when her father lost power, she became an orphan without a mother to love her and a father to rely on. Her mother-in-law made things difficult for her and withheld her monthly payment; Aunt Liu gave birth to a concubine, and she had a strange mood every day; Cui Jinshu, the legitimate daughter left behind by the main wife, did not like her and made trouble in every way; even the evil servants under her command dared to ride on her head. What's even worse is that someone mixed chronic poison into the soothing incense she ordered every day, hoping to make her "die" without her noticing. It's a pity that they don't know - Shen Heng, who is proficient in pharmacology and toxicology, studied under the master of Xiang Dao who retired from the palace. A stick of incense can soothe the mind, but it can also kill one's life. A medicine can save people, but it can also kill people's hearts. When Aunt Liu designed her to "poison the concubine", she dismantled the fragrant recipe in public and accused her of colluding with outsiders to murder the mistress; when Cui Jinshu plotted against her to seize the power of the family, she lightly exposed the loopholes in the account book and asked the legitimate daughter to kneel down and admit her mistake; when Cui Yan, the head of the family, listened to the other side of the story, she gave her husband diarrhea in public with a bowl of medicinal food, which completely ruined his face. From then on, he dared not look down on the mistress of the second house. But the real enemy has just revealed his fangs - the daughter of Daliang respects the country, and only the legitimate daughter of a noble family has the right to inherit. Shen Heng had no biological daughter, and the inheritance rights of the second wife of the Cui family were about to fall to the concubine. She must give birth to a legitimate daughter before everyone else, or... Adopt an obedient one from the clan. And the person who was manipulating everything behind the scenes was waiting for her to be doomed.