Episode Summary
The police identify Dr. Zhao as the insider who killed Jiang Fei and Qiu Lanzi to avenge her daughter's drug-induced coma. Han Feng and Qi Sizhe discuss their fractured relationship and a disputed past case involving a drug lord. A new murder leads the team to a forest cave, where they discover a gruesome altar filled with human cocoons.
Spoiler Alert
The Call is Coming from Inside the House
Qi Sizhe confronts Han Feng with a disturbing theory. He is certain someone messed with Jiang Fei’s autopsy report. The culprit knows pharmacology. They know police procedures. They have access to the files. This isn't a street thug. This is a cop. Han Feng listens to the logic. He admits the killer is likely one of their own. Zhu Qingyue stands nearby and hears every word.
The Invisible Clue
Qi returns to the autopsy room. He tries to get into the headspace of the forensic staff. A sudden flashback of a car crash hits him. He shakes off the trauma and focuses. He tells the team the body shows signs of tampering. Jiang Fei wrote the killer's name on his own skin with invisible ink. The killer wiped it off. They also deleted the blacklight photos from the crime scene.
But they missed a spot. A faint trace on the arm reads "Eva."
This points to Zhang Lu. Eva is the name Jiang Fei gave her. But Zhang Lu has no motive. Jiang gave her money and clothes. She had no reason to hurt him. Police test the medication found at her workplace. It is clean.
The Doctor's Revenge
Han Feng watches the nightclub footage again. He spots the trick. The woman in the video is an imposter pretending to be Zhang Lu. The killer switched the pills later. Gao Yuan brings a new report on the drug formula. This leads them to the lab records. Dr. Zhao handled all the biological evidence.
The team rushes to the hospital. Dr. Zhao is trying to transfer her daughter, Zhao Yiwa. They run a new blood test. Dr. Zhao’s blood matches the sample found at Jiang Fei’s home. The evidence is undeniable.
The motive is personal. Jiang Fei sold the raw diamonds and drugs that destroyed Zhao's family. Her daughter overdosed and fell into a vegetative state in a bathtub. Dr. Zhao wanted poetic justice. She impersonated Zhang Lu. She drugged Jiang Fei. She let him freeze to death in a bathtub. Jiang Fei stabbed her before he died, but she finished the job. She also killed Qiu Lanzi to cover her tracks.
Zhu Qingyue shows the doctor a social media post. It is the last thing her daughter wrote. She complained that her mother was a good doctor but never had time to save her. Dr. Zhao breaks down. She thought she was avenging her daughter. She only added to the tragedy.
Old Wounds
Han Feng sets the record straight with Zhu Qingyue. He and Qi Sizhe used to be close. Now they are just colleagues. The friction stems from an old case. Han shot a drug lord named Li Ming. He closed the file. Qi insists the dead man was a body double. He believes the real criminal is still out there. He thinks the current murders link back to that unsolved mystery. That is the only reason he is here.
Into the Web
A terrified, injured girl bangs on a stranger's door in the middle of the night. A figure in black follows her. By the time police arrive, the homeowner, Huang Hao, is dead. The girl is gone.
Han Feng hears a noise outside. He leaves Qi behind and sprints into the woods. He catches up to the man in black. They fight. The suspect is wounded but claims he is innocent. He says he saw the real killer.
Qi Sizhe finds a blood trail. He follows it to a cave entrance. Zhu Qingyue joins him. Han Feng catches up. They lose cell signal immediately. Inside, the cave is a house of horrors. Cocoons hang from the ceiling like giant pupae. Qi cuts one open. It contains animal parts. They push deeper into the dark. They find a massive structure that looks like a spider web altar. It holds more dolls. It also holds human bodies.
