Infernal Affairs

In the neon-soaked streets of Hong Kong, a war is being fought in the shadows. Two young men find themselves living double lives: Chan Wing-yan joins the police force as an undercover mole for the Triads, while Lau Kin-ming infiltrates the police department on behalf of the mob. Years later, these two former rivals, now older and weary, realize they are the only ones who know the other's true identity. The race to expose the traitor within their own ranks begins, driven by a desperate need for survival and redemption.[edit]