Carly Chase is traumatized ten days after being in a serious traffic accident. Then she receives news that turns her entire world into a living nightmare. The drivers of the other two vehicles involved have been hunted down by a sadistic killer. Now detective Superintendent Roy Grace of the Sussex police force issues a stark and urgent warning to Carly: she could be next. The police advises her that her only option is to go into hiding and chang her identity. The terrified woman disagrees - she knowd these people have ways of tracking you down anywhere. If the police are unable to stop them, she has to find a way to do it herself. But already the killer is one step ahead of her, watching, waiting and ready....