
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-faiBlue
Louis KooShiu Chi-Long
Francis Ng Chun-yuQ-Sir / Inspector Q
Charmaine Sheh Sze-manDing Siu-Ka
Benz Hui Siu-hungFoon Hei-Gor
Moses Chan HoPolice Superintendent
Louis CheungTriad Member
Clara Lee Sung-minAssassin
Li GuangjieTung Pak-Ho
Zhang HuiwenSiu Ying, Blue's Bodyguard
Xing YuSniper
Cheng TaishenKwok Ming
Lo Hoi-pangTriad Member
Bob Lam Shing-banFerrari Owner
Timothy Cheng Chi-singLam Tung Yau