Kei-gee tells the chums to consider collaborating with Chok-wing. But Ka-keung and Foon-hei have reservations about Chok-wing. Cheuk Hoi reckons it is worth a try as he realizes Kei-gee is assertive. Kei-gee finds a vintage laptop among the things left behind by the late Wing-cheong. But she does not know the password for accessing it. Kei-gee manages to access the computer as Cheuk Hoi tells her to use Suk-mui’s unique identification number. She then discovers evidence on the machine that shows Chi-on has been abusing his authority for his personal gain over the years. Chok-wing covertly deletes evidence associated with his false identity as he wants to hide his true identity. Two suspects who assaulted Suk-mui are getting ready to leave Hong Kong. Foon-hei and Man-ding slyly create a fake scenario in which Chi-on is going to silence someone. They manage to mislead the suspects into surrendering and testifying against Chi-on. Lai-kwan takes her team to Security Bureau to arrest Chi-on
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