A vicious criminal is targeting DI Nikki Galena and her team. One by one he will hunt them down and destroy their lives, unless she can stop him first DI Nikki Galena faces her toughest challenge yet. Can she save her team and herself from a cruel and determined adversary who will stop at nothing to harm Nikki and her colleagues? First she must work out who wants revenge against her or one of her detectives. And what is the connection between the series of attacks on the police and the mystery of woman found dead in a seemingly impregnable locked room?