The Forensic Unit of the Yunxi City Police Department is where the most major and baffling cases converge. Led by Captain Leng Qiming, a team of young, sharp investigative minds—including Ye Qian, Si Yuanlong, Jiao Lei, and Zhang Ziwu—tackles each puzzle. As they peel back the layers of one bewildering crime after another, they expose not just the truth but the raw nature of those involved. Yet just when one mystery seems solved, another emerges from within it. Step by step, as the truth comes to light, so too does the real face of human nature.