Xia Mian was once the most dazzling criminal psychology genius in the police academy, but due to excessive empathy during a case simulation, she developed acute stress disorder and has since been unable to look directly at any bloody scene. After dropping out of school, she hid in a cake shop for two years, unraveling unsolved cases in her mind every night when she had insomnia, and deleting them all before dawn. Until she was pulled into the Abyss of Sin, an alien space condensed by the resentment of unsolved cases, she was forced to face her fear in the dungeon.
In the first copy of "Blood Graduation Photo", she deceived her teammates with her trembling good-for-nothing appearance, secretly uncovered the truth about the girl's fall from the building ten years ago, and publicly overturned the team's judgment at the graduation ceremony. Since then, she has shuttled through unit dungeons such as the missing case in the elevator secret room, the kindergarten fairy tale massacre, the team battle in the abyss prison, and the death live show. Each time, she uses her empathy talent to speak for the silent victims, and at the same time, she is getting closer to the truth of the "serial throat-cutting case on a rainy night" where her mother was murdered eight years ago.
Above the abyss of sin, S-class executioner Ling Xiao has been secretly observing her. His body has been deeply eroded by the abyss of sin, and part of his memory has turned into a replica monster. Xia Mian's mother was once his partner. When Xia Mian broke into his memory palace to complete the redemption, the two revealed the "Dossier Zero" behind the sin abyss - a perfect criminal who tried to swallow reality with resentment. In the end, Xia Mian used pure criminal investigation methods to bring an end to her mother's unsolved case in reality. From the ridiculed waste to the legend of sin, she used every piece of herself that was crushed to regain the truth and herself.
Purpose: The truth itself is not the end, being heard is. And this story is about a person who was once not heard, and finally became the person who "hears others."