The day after Professor Silverlake, a consultant neurologist at the Dartmouth London hospital, raised his voice at three patients for smoking and drinking on the premises, all three are found murdered. Silverlake, apparently the last doctor to visit the ward, later goes berserk with a shotgun after he is accused of the killings, however, is subsequently killed himself by a police sniper. Leo and Harry believe they have a cut and dry case, however, when the ward's night nurse is murdered, believe they could have a cover up on their hands. Meanwhile, Nikki is deeply upset at having to perform an autopsy on a little girl who is suspected to have been raped and murdered by convicted criminal Jason Bodie, a man who Professor Silverlake once performed live-saving surgery on. Whilst Bodie is committed as unfit to plead, Silverlake's daughter Naomi asks Leo and Harry to help clear her father's name of murder. As Nikki's mental instability over the girls' death worsens, Harry and Leo are forced to get her psychiatric help. But as the true identity of all the murders is discovered, it becomes a race against time to save Nikki's life.