The details of undercover police officers are deleted from a police database and a senior officer is left struggling to know who are the undercover officers and who are the criminals.
Nick Cheung Ka-Fai
Blue
Louis Koo
Shiu Chi-Long
Francis Ng Chun-Yu
Q-Sir / Inspector Q
Charmaine Sheh Sze-Man
Ding Siu-Ka
Benz Hui Siu-Hung
Foon Hei-Gor
Moses Chan Ho
Police Superintendent
Louis Cheung
Triad Member
Clara Lee
Assassin
