The Assassin

The assassin hunts killers and he's good at it. He moves in the shadows and strikes in silence. They die quietly as his blade penetrates their skin. They never see him coming, he is like a ghost to his enemies. When he is confronted one rainy night by Detective Grace O'Malley, who is pointing her gun at his chest, an old saying comes to him and he realizes it is true, no good deed goes unpunished...