Three years ago, she was his contract wife, and she was also the female medical examiner who personally wrote down her doubts about him, Bai Yueguang, in the autopsy report. He tore up the report in public and accused her of evil intentions. Three years later, serial murders reappeared, and she, who had become an international authority, was forced to return. Facing his complicated gaze and the escalating crime, she only has evidence and truth. And when all the new clues were woven into a web, pointing to the "perfect" victim he had spent his career protecting, he finally saw clearly that what he had destroyed with his own hands was not only his marriage, but also the justice closest to the truth. This is a revenge carried out with science, and a lesson taught with blood: evidence does not lie, but people's hearts do.