With the help of forensic science,
Even the slightest piece of evidence can lead you to the truth!

Bobby Au Yeung will be a Forensic Collector/Investigator.
Frankie Lam will be a Mortal Analyse.
Yoyo Mung will be a Police Detective.
Linda Chung will be a Trainer in Bobby Team.

Senior chemist of the Forensic Science Division KO YIN-POK (AU YEUNG CHUN WAH, BOBBBY) is a rational and level-headed type with remarkable powers of observation. Through the examination of physical traces like a small strand of hair of tiny fibers form clothing, he can help the police crack even the toughest cases. What is ironic is htat his brother-in-law, KOO CHAK-SUM (LAM MAN LUNG, FRANKIE). who is a forensic pathologist, and senior inspector LEUNG SIU-YAU (MUNG KA WAI, YOYO) have both come to suspect him of poisoning his wife.

With his profound forensic knowledge, POK finally manages to prove his innocence. POK, SUM and YAU - the iron triangle of the Forensic Science Division, the Forensic Pathology Service and the Hong Kong Police - continue to work in close collaboration with one anothers, as they always did. But all is not well when strange happenings begin to occur. It appears to the trio that the more cases they solve, the more mysteries confront them. Things have become far too complex. It seems that someone is plotting against POK and even trying to do away with him.......

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