Ava's eyesight is deteriorating and the only cure is a magical rock, banned because of its unpredictable and sometimes lethal nature. In her desperation she turns to Skip, a rock runner with the knowledge and contacts to help her. But can she trust him and his hostile sidekick? The world of rock use is riddled with casualties and eccentrics. Ava must find a cure before the law catches up with her, her eyesight is lost forever, or worse...