阿昆(刘德华饰)长年垄断了海洛因市场,虽视追随8年多的阿力(吴彦祖饰)为接班人,但阿昆一向小心行事,从没透露过“货仓“、加工场的位置也未见过其他“同事”。阿昆打算把自己的生意全权交由阿力打理,阿力渐渐知道了更多毒品市场中的秘密。 8年来阿力以卧底的身份搜集毒贩的全部资料,但他对吸毒者阿芬(张静初饰)投入了感情,阿芬的景况却令他对自己边缘人的身份感到更加迷惘。 斗志斗勇的过程中,阿力最终取得了阿昆的完全信任,8年来的追踪,也有了终结。A special agent has for 8 years been deep undercover in Asia's lucrative organized crime trade as he plays protégé to one of the key players, Banker. Nick now has but he has started to feel loyalty to his new environment, and to the money.