An cop in torn in the middle of hunting down a triad and preventing an all out war between other triads as disagreements and actions are invovled in all the parties.

"Chan Wing Yan is a hard-nosed veteran cop sent undercover to infiltrate the notorious Triad crime ring. An expert at bringing down violent crime syndicates, Chan thinks it's going to be a routine mission. What he's not prepared for is the discovery that the Triad's boss has [also] planted a mole in the police department ... and now Chan is being hunted down. In this battle of wills, only one cop can win!" -- Container.