Detective Bobby Wu was once a proud and corruptless cop who was heavily decorated and have a beautiful wife and three kids. One day he investigated the sales of illegal weapons and found out several cops on the force were crooked.
He tried to shut them down; but the Chief of Police; who was the man behind the illegal guns, hired some thugs to do a drive-by on his home; sadly killing his family, and leaving Bobby wounded, a bullet dangerously close to his heart.
Seeing his whole life end in tragedy, Bobby decided that the best way to fight crime was to go outside the law and to become the very thing they hate; a vigilante. He donned a mask and became a hitman of justice whoose name is only known as "Lion Dog".
Very agile, knows various martial arts, good at firearms.