The smell of disinfectant is the only sense of security for Su Qingyuan, the youngest attending cardiothoracic surgeon at Jiangcheng First People's Hospital. She holds a lancet in her hand to save lives and heal the wounded, and is as calm as a precision instrument, but under her skin there are scars that have not healed for eighteen years - her twin sister Su Qinghe was harassed and isolated by her class teacher Zhao Jingming for a long time in high school, and eventually fell from the building "accidentally". Zhao Jingming's perfect disguise has made him rise to the middle level of the Education Bureau.
For eighteen years, Su Qingyuan never gave up revenge. She refined her profession, accumulated resources, and formulated a sophisticated "liquidation plan", vowing to ruin Zhao Jingming's reputation. But as soon as her revenge started, forensic doctor Shen Yicheng, who injured her left hand, disrupted her rhythm. This gentle man could always see through her disguise and touch her frozen heart with casual warmth.
The lancet can save people, but it can also be a weapon of revenge. Her vocation as a doctor and her obsession with revenge were torn apart fiercely in her body. As the plan progresses, more truth about her sister's death emerges, and the protective umbrella behind Zhao Jingming gradually emerges, leaving Su Qingyuan deep in the whirlpool of revenge. Shen Yicheng's approach is not only a glimmer of redemption, but also plunges her into a choice: should she follow the dark road of revenge to the end, or should she believe that the law can end evil with justice?
In the end, in the intertwining of truth and lies, and the collision of human nature and obsession, Su Qingyuan suddenly realized: the real reckoning is never to destroy others, but to let go of the past and protect the light of the present. And Shen Yicheng is always the one who stands by her side and helps her get out of the rift in her mind.