An Assassin's Heart

When Rosemary's mom is suddenly murdered, her dad moves them to New York, thinking that someone is out to get them. Rosemary's dad has always been a great business man, but until now she never thought why. Since Rosemary was twelve she's been training in martial arts, basically anything to do with harming a human being. Now that her mom was murdered, she is now forcing herself to train harder. This time she'll be ready. But how can she be when she knows that nothing is ever what you thought it was?