S9.E104 ∙ AG 104: Steven Martinez and Michael Steven Banuelos

Elite officer reassigned to Unidentified Crimes Unit after an incident involving his subordinate. He teams up with a genius who possesses supernatural "SPEC" abilities, uncovering a criminal world run by powerful SPEC individuals.

Jian Fan is son of a cook and confident in cooking. He works with criminal police after graduation and eventually becomes an outstanding police officer.

Policewoman Yiu Chi-yue (Venus Wong) is a natural born Highly Sensitive Person. She brings chocolate, salty lemon water and a brain with an "on-off switch" with her whenever she investigates cases. Her senses are heightened when she drinks salty lemon water that arouses her keen awareness of clues at the crime scene. Through touching the dead body, gathering evidence and her senses, she empathizes with the victim and reconstructs the sequence of events. Since Chi-yue met restaurant boss Wong Mik-kei (Pakho Chau), the duo are no longer "spectators". Perpetrators at large are killed one after another. Chi-yue covertly challenges some serial killer on several occasions, and their true identity is gradually uncovered. Chi-yue realizes the two of them have conflicting standpoints even though they are like-minded, causing her to face the conundrum of making life choices. In the meantime, Mik-hei astonishingly makes some decision for her.

The story of famous people who were tried for serious crimes but believed to be acquitted only because of their money and fame.

Kepler, a mentally unstable cop on leave, is forced to return to the job. Amidst suffering migrants, the body of a young white girl is found in macabre circumstances. For Kepler, the price to pay for the truth might just be his sanity.