A young boy left for dead by the assassins who killed his parents is taken under the wing of a martial-arts master, and shaped into a lethal killing machine with an insatiable appetite for revenge. As a ten-year-old child, Manit (Jon Foo) saw his parents murdered in cold blood. When the killers were finished, they put a gun to his head, and pulled the trigger. Incredibly, Manit survived, though the bullet in his brain left him devoid of all emotion. Subsequently adopted by a kindly martial-arts master, Manit trained tirelessly for the next 20 years, always knowing that the day would come when he would bring his parent's killers to justice. When the time comes to embrace his destiny, Manit embarks on a violent quest for vengeance that brings the entire Bangkok underworld crumbling down.