Year			2002
Original title			Wu jian dao
Original lang.			Cantonese
Country			Hong Kong
Genre			Action thriller
Parents			Violence
Length			1:41
Director			Wai Keung Lau Siu Fai Mak
Writer			Felix Chong Siu Fai Mak
Company			Alliance Atlantis
Starring			Andy Lau Tony Leung Chiu Wai Anthony Wong Chau-Sang Eric Tsang Kelly Chen Sammi Cheng Show more... Andy Lau Tony Leung Chiu Wai Anthony Wong Chau-Sang Eric Tsang Kelly Chen Sammi Cheng Edison Chen Shawn Yue Elva Hsiao Man-Chat To Ka Tung Lam Ting Yip Ng Dion Lam Wan Chi Keung Hui Kam Fung

The film follows the parallel lives of Ming (Lau), a cop who secretly reports to ruthless Triad crime boss Sam (Eric Tsang); and Yan (Leung), an undercover police officer who poses as a Triad member in Sam's gang. For Yan, the years of living in the criminal underworld have taken their toll, and he longs to return to regular police duty. However, the only person who knows Yan's true identity is his mentor Superintendent Wong (Anthony Wong), also the unsuspecting superior of Ming. When Wong's officers come face to face with Sam's gang, both leaders realize there are moles in their midst. Soon Yan and Ming must track each other down, leading to an inevitable confrontation.