She hunts her enemies one by one. Looks into their eyes. Shows them her face. To let them know they've been beaten by an eighteen year old girl. A new breed of psychopath terrorises San Francisco: a woman who is seductive, manipulative, and lethally proficient in martial arts. First to die is Toshigi Tasoto - a prominent videogame developer whose company created Jade Dragon, the female ninja character imitated by the real life murderess. Investigations lead to Tasoto's daughter Nicole, a games designer as brilliant as she is beautiful. Her past is the key to the mystery. But is she a potential victim. .or a killer playing a murderous game?