In the humid town of Qingxiang in the late 1990s, 15-year-old Lin Wantang fell into the abyss because his father was addicted to drugs and his mother went crazy. On a rainy night, she was pushed to an alley clinic by her mother, where she met 21-year-old Chen Mo. On the surface, Chen Mo is a cynical clinic doctor, but in fact, he is an anti-drug policeman who suffers the pain of his father Qiao Mingyuan's undercover sacrifice. He used the clinic as a base to hide, but after taking Wan Tang in, he was overcome by her tenacity. Wan Tang discovers evidence of his father's drug trafficking in the attic, and regains hope in the light of Chen Mo's scalpel and the warmth of Chen Mo's mother. The relationship between Lin Wan Tang and Chen Mo heats up amid repression and temptation: from unfamiliar confrontation to brother and sister dependence, from secret affection to two-way redemption. Chen Mo healed Wan Tang's trauma with professionalism and gentleness, while Wan Tang used a scalpel as an edge to cut through the past, and melted Zhou Qiuyun's depression with kindness. When the drug den of the textile factory was destroyed, the two released their forbearing love under the moonlight and agreed to use the "Qingxiang Clinic" as a starting point to fight against evil together.
Five years later, Wan Tang became a forensic doctor, Chen Mo completed his undercover mission, and the clinic was renamed "Qingxiang Forensic Studio". They reunited under the camphor tree, only to find that the root of the drug had not been eradicated - the drug network had penetrated to the top, and the "deep sea" forces had surfaced. From the ruins of a textile factory to the manor of a transnational drug lord, Wan Tang and Chen Mo used scalpels to analyze the texture of crime, illuminated dark corners with police badges, and uncovered the truth behind the coercion of their father Lin Ruqiang. They also faced the crazy counterattack of the drug cartel amidst gunfire and flames. The bloodstains on the bluestone are eventually washed away by the years, and the wind chimes under the camphor tree sway to new life. Two souls stabbed by fate use love and justice to plant a hope that will never fade in the ruins.