Su Qingyuan, a forensic doctor with special powers, can touch objects related to the deceased and hear sounds. When she joined the police station, she was questioned by veteran detective Zhao Jianjun about her "metaphysics to solve cases", and newcomer Li Mengmeng became his ally. She cooperates with the unruly detective Lu Shiyan to solve cases such as the murder of elderly people and the poisoning of pets. The two gradually develop trust, but there is a rift due to Lu's family secrets (her grandfather is Su's father, Su Zhenbang's old contact, and his father's business is involved in smuggling and laundering) and the blind date arranged by his mother.
The silver lock piece showed clues to the "Nancheng Warehouse" under ultraviolet light, leading to the smuggling case 20 years ago. Best friend Lin Weiwei is actually a pawn of the organization, misleading the investigation and spreading unfavorable remarks against Su, but she hides the conscience of the tree hole in the orphanage. Technical genius Shen Ze, with an old injury (his left hand was damaged due to fighting against the "Darknet Ghost"), helped crack encryption, track down Lin Weiwei's location, and also find his missing sister Shen Yue. He once fell into the ethical dilemma of "helping Lu investigate the case was against his ethics."
Lin Weiwei kidnapped Su Mu to search for clues and eventually turned against her; Shen Ze found his sister to obtain group data; he teamed up with the military to raid the factory, and Su Qingyuan used a silver lock to open her father's USB flash drive to solve the case. The smuggling organization was destroyed, Su's father was recognized as a martyr, Lin Weiwei's sentence was commuted, and Shen Ze's brother and sister started their own business. Su, Lu, Shen and Li Mengmeng formed the "Special Case Consultation Group" and went to new cases late at night to continue the search.
