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.
- Genre: Action, Crime, Drama
- Studio: Shaw Brothers, TVB, PJ One Cool Film Company Limited, One Cool Pictures, Stellar Mega Films, J.Q. Pictures, Media Asia
- Keyword: drug dealer, undercover cop, police investigation
- Cast: Nick Cheung Ka-Fai, Louis Koo, Francis Ng Chun-Yu, Charmaine Sheh Sze-Man, Benz Hui Shiu-Hung, Li Guangjie