Jo Black was the key to a puzzle. The only problem was, no one bothered to tell her. As a result, she found herself in a crossfire between people who wanted her dead and those who needed her alive. The people using her were ruthless. But there was something they didn't understand - so was she. She was going to have to see this fight through to the end. And, that wasn't necessarily a bad thing. They weren't the only ones that could hunt.