The heroine, Lin Zhaoning, was a doctor of toxicology and pharmacy in her previous life. After being murdered by her best friend and her husband in conspiracy, she was reborn as the legitimate daughter of the ancient medicine merchant Lin family who was kicked out of the house. With all the pharmaceutical knowledge from her previous life, she used "poison" as a weapon and "medicine" as a means to embark on an unstoppable path of revenge in this world where medical care is backward and poisons are rampant.
