Kill or be replaced.

After he betrays Mr. Wei, the ruthless crime boss who hired him to avenge his son's death, professional killer John Lee (Chow) goes on the run. Enlisting the aid of beautiful document forger Meg Coburn (Sorvino), Lee attempts to return to his family in China before they are victimized by his betrayal. But Wei's army of "replacement killers" is hot on his trail, and now both he and Meg are targets of their impressive firepower. With both sides fully armed and determined to fight to the death, an ultra-violent shoot-out breaks out when they finally face off against each other.