The heroine in traditional palace and house fighting stories usually relies on "detoxifying and saving people" to gain power or love. This article goes the opposite way. What the heroine is proficient in is "poisoning and controlling poisoning". She is not a miracle healer, but a "poison doctor" who walks on the edge of taboos. She uses the poison technique that is feared by the world as her trump card in the harem and house fights. Through the methods of "controlling people with poison", "exchanging lives with poison", and "using poison to disrupt the situation", she has gone from being abandoned by her family to being a manipulator who controls the situation in the court and harem. Medical skills are no longer the holy hand for saving lives, but the sharp blade that stirs up the storm of power. Every seemingly harmless spice, makeup, and meal may contain fatal murderous intent.