Shen Qingli, a modern genius doctor, accidentally slipped into an ancient sadistic novel and became the vicious female supporting character of the same name. The beginning is hell - tied to the execution ground, about to pay for the crime of "poisoning" the regent Xiao Jue and Shen Qingwan. Faced with Xiao Jue's deep hatred and cold blade, Shen Qingli relied on her professional instincts to point out that Shen Qingwan was not really dead. In order to survive, she was forced to become Bai Yueguang's exclusive doctor, walking on thin ice under Xiao Jue's constant surveillance. She used extraordinary medical skills to save people, and also quietly explored the truth, only to discover the frame-up of the original owner's sister, the strangeness of Xiao Jue's sachet, and even the strange resentment in Bai Yueguang Shen Qingwan's eyes after she woke up and the whispers of the "system"... When the black shadow in Shen Qingwan's body appeared, Shen Qingli suddenly realized that they were all just pawns controlled by the invisible "system". In the dual whirlpool of power struggle and strange system, Shen Qingli must use medical skills and wisdom to break the situation, tear off the disguise of the substitute, and win the chance of survival. In the fatal confrontation and forced closeness with the cold regent Xiao Jue, Shen Qingli must find the possibility of redemption for each other, and fight against the mastermind behind the scenes who wants to swallow everything.