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.
Blue
Nick Cheung Ka-Fai
Shiu Chi-Long
Louis Koo
Q-Sir / Inspector Q
Francis Ng Chun-Yu
Ding Siu-Ka
Charmaine Sheh Sze-Man
Foon Hei-Gor
Benz Hui Siu-Hung
Police Superintendent
Moses Chan Ho
Triad Member
Louis Cheung
Assassin
Clara Lee
Tung Pak-Ho
Li Guangjie
Siu Ying, Blue's Bodyguard
Zhang Huiwen
Sniper
Xing Yu
Kwok Ming
Cheng Taishen
Triad Member
Lo Hoi-Pang
Ferrari Owner
Bob Lam Shing-Ban
Lam Tung Yau
Timothy Cheng Chi-Sing
Karina
Jade Leung Tsang
Hong Sir
Jimmy Au Shui-Wai
Samantha, CIB Detective
Rebecca Zhu
CIB Detective
Stefan Wong
CIB Detective
Grace Wong
Shiu Chi-Long's Subordinate
Hugo Wong
CIB Detective
Océane Zhu
Ng Pak
William Chak
CIB Detective
Sammi Cheung
Triad Member
Choi Kwok-Hing
Lam Bok-Man's Bodyguard
Ken Law Ho-Ming
Lam Bok-Man's Bodyguard
Jerry Leung Ho-Kai
Triad Member
Ben Yuen Foo-Wah
Auntie Mui
Alice Fung So-Bor
Cocktail MC
Michael Wai Chi-Ho
Assassin in Sauna
Cheung Lap-Fung
Mandy
Keira Wang
Banker
Fung Hong-Ling
Restaurant Manager
Leo Lai Yat-Nam
Peter, IT Manager
Kevin Tong
Bank Client
Carlos Koo
Ma Sir
Benjamin Wong Chi-Kong
Interrogation Room Policeman
Vernon Fong
Interrogation Room Policeman
Ho Chun-Hin
Shiu Chi-Long's Thug
Xavier Leung Kwok-Kin
Chum Foon Hei's Thug
Sunny Chow
Chum Foon Hei's Thug
Kwing Lam Ka-Wing
CIB
Lau Tin-Lung
CIB
Terrence Huang
CIB
Penny Chan Kwok-Fung
CIB
Yu Miao
CIB
Dickson Wong Tak-Sang
Triad Member
Jones Lee Chung Hei
Triad Member
Alex To Kong
Triad Member
Julius Brian Siswojo
Triad Member
Phat Chan
Triad Member
Edward Chui Wai-Tung
Lam Tung Yau's Bodyguard
Andy Wong Chi-Man
Lam Tung Yau's Bodyguard
Che Kim-Fai
Kwok Ming's Thug
Jason Wong
Kwok Ming's Thug
Jacky Lei
Surveillance Room Policeman
Ronald Lam Tsz-Kit
Tung Pak-Ho's Thug
Derek Lam Ling-Yuen
Tung Pak-Ho's Thug
Woo Man-Jun
Ng Pak's Thug
Emil Chan Cheuk-Wah
Police Inspector
Jordon Ho Kwok-Nam
Police Inspector
David Yu Tat-Chi
Police Inspector
Mark Lam Wing-Chung
Police Inspector
Chan Ying-Kit
Kwong Ming Lawyer
Akai Lee
OTCB Officer
Cheung Wing-Kai
OTCB Officer
Ng Chi-Wai
OTCB Officer
Kwong Yuk-Chung
OTCB Officer
Law Yim-Cheong
Drug Lord
Jorge Lucas
Driver
Aires Jorge Ramos
Ding's Police Guard
Yiu Man-Kei
Ding's Police Guard
Tommy Leung Pok-Yan
Hitman
Wong Wai-Tong
Hitman
Kong Fu-Keung
Hitman
Cheung Ping-Chuen
Hitman
Paco Yick Tin-Hung
Kris Li Chun-Pan
MJ Chan