When four strangers broke into Kerri Arai's happy home, his mother did everything she could to protect him. But unfortunately for him, the violent encounter left Kerri with nothing but a diamond-shaped scar around his heart. Now he's alone, grief-stricken, and desperate for revenge against the men who took his mother's life. With the help of a mentor named Takanaga, and some very special powers, he's finally prepared to hunt down and destroy these...