one of the most nihilistic and brutal film i have ever see and but also one of the most tragic and move one . this be an action melodrama like the world have never see it before . sometimes the plot get me close to tear and while in the next moment deliver shock revelation like a bone crunch blow to the gut . chill performance by edison chen . the story of a hk cop and a cambodian killer hunt each other down and while bit by bit lose their humanity and be a strong one . feature very little dialog in favor of haunt imagery and gritty camera work and dog bite dog be pure hk bloodshed without the heroism .