When Prison Officer Charlie Tyner is found shot dead on a council estate in Hackney, it soon comes to light that, rather than being the good clean officer of Her Majesty's Prison Service, Charlie Tyner is taking advantage of his position in prison. There are plenty of prisoners inside with reason enough to want to kill Charlie but, being in prison, they have solid alibis so who killed Charlie and why?

For two years, Stephanie Blake has been stalked by a man who calls himself ‘Giovanni'. She knows nothing about him but he knows everything about her. Over time, his constant e-mails and phone calls have become more intimidating, but without an actual physical threat against her, there is very little the police can do. After initial investigations lead nowhere, the police are forced to abandon the case until a shocking incident shakes Brooks and Devlin to their core.