The heroine, Lin Zhaoning, was a doctoral expert in toxicology and pharmacology in her previous life. After her best friend and husband conspired to kill her, she was reborn as the legitimate daughter of the ancient Lin family of apothecaries, who had been driven from her home. Armed with all her pharmaceutical knowledge from her previous life, she enters a world where medicine is backward and poisons run rampant. Using poison as her weapon and medicine as her means, she carves out a path of revenge that no one can stop.
