The head of an elite Hong Kong surveillance unit keeps one eye on his rookie apprentice and the other on a notorious criminal he suspects of masterminding a recent jewel heist in this tense thriller from filmmaking duo Johnnie To and Nai-Hoi Yau. Of course, the criminal knows all along he's being watched. But that doesn't stop him from trying to pull off the biggest score of his career.
任達華
as Capt. Wong Man Chin / Dog Head
梁家輝
as Chan Chong-shan / Hollow Man
Kate Tsui
as Peggy / Piggy / Constable Ho Ka Po
邵美琪
as Madam Fong
林雪
as Ng Tung / Fatman
張兆輝
as Snr Insp. Chan
Jimmy Wong Wa-Wo
as Wo / IB cop
Him Law
as Snakie / SU agent
吳廷燁
as Shan's Gang Member
黎耀祥
as Shan's Gang Member
彭敬慈
as Shan's Gang Member
Frank Liu Zong-Ji
as Shan's Gang Member
