Canaan is a mysterious young woman with equally mysterious abilities. The sole survivor of a war that took place in her village, she was taken in by a wandering man who taught her how to use a firearm. Seeing him as her only family, she is devastated when he is killed by an assasin from his own past. When we meet Canaan, she has become a mercenary working on the streets of Shanghai, and is hellbent on avenging the loss of her only \"family...\"