Episode Summary
The police discover a secret dissection room behind a shelf in the specimen lab. Evidence points to Professor Huang, who suffers from Parkinson's. While Huang admits to illegal experiments, his condition makes it impossible for him to be the one who dismembered the victim with such precision. The investigation pivots when the team learns the victim bears a striking resemblance to Ding Youmei, the daughter of another professor, Gao Huilan.
Spoiler Alert
The Secret Behind the Shelf
Qi Sizhe follows his gut. He bets the specimen room is the primary crime scene. He is right. Zhu Qingyue finds a cut fence in the back mountain. That is the killer's escape route. Wan Guoxin takes a team to scour the woods for the missing head. Meanwhile, Qi and Han Feng hit the specimen room. They find blood trails on the floor. The trails stop dead at a shelf. The team shoves the heavy rack aside. There is a secret room hidden right behind it.
The hidden room is a nightmare. It holds brain specimens and a notebook. Zhu flips through the pages. It details exactly how to prepare a head specimen. The signature on the first page reads Huang Zhengming. Qi sprays Luminol. The room lights up. He tells Han this is definitely where the killer cut up the body. A school administrator drops some intel. The rooms used to connect. Professor Huang Zhengming might have kept a key. He is a brain expert. People call him "Huang One-Knife."
The Takeout Connection
Han and Zhu toss Huang’s office. They find a takeout receipt from Spring Restaurant. That is Liu Yuanyuan’s workplace. It feels like a solid lead. Qi checks the head found in the secret lab. It does not belong to Liu Yuanyuan. The police bring Huang in for questioning. He admits to the unauthorized experiments. He denies the murder. He claims he just used the space for science.
Han slams the takeout receipt on the table. Huang shrugs it off. He says he orders food randomly. He claims he never saw the delivery person. Qi texts Zhu with a theory. Huang needs massive data for his research. Huang gets cocky. He tells the cops he would kill for his experiments if it guaranteed success. But he dares them to find proof.
The Shaking Hand
Huang leaves the interrogation room. He looks up at the lights. His hand trembles uncontrollably. Qi watches him closely. He spots the watch on Huang's wrist. It looks exactly like the one Li Ming wore. Qi tells Han about the watch. Han remains skeptical.
The search team finds six heads in the woods. Huang has an excuse for everything. He claims they are donations or medical waste. Qi examines Liu Yuanyuan’s head. A hammer blow killed her five days ago. But the decapitation cut grabs his attention. It is perfect. Smooth. Precise. Qi looks at the notebook again. The handwriting changes halfway through. It gets shaky. Huang has Parkinson’s disease. He physically cannot make a cut that clean. He didn't cut off Liu Yuanyuan's head.
The Daughter
Qi confronts Huang about the watch. Huang explodes in anger. He refuses to talk. The team hits a wall. The other suspects have alibis. They re-examine the timeline. Liu Yuanyuan entered the school with items that vanished. Li Xiaoxi finds a witness. Gao Huilan moved a corpse gurney with a terrified student recently.
Zhu visits Liu’s old teacher. The teacher drops a bomb. Liu looks exactly like a former student named Ding Youmei. The team runs a check. Ding Youmei is an assistant professor at the medical school. She is also Gao Huilan’s daughter. The connection is undeniable. Later, Qi visits Yu Fei’s grave. He swears he will uncover the truth.
