Set among the wealthy beachfronts and gritty back-streets of Brighton, police detective Nancy Devlin finds herself at the centre of the most dangerous case of her life when she is ordered to investigate the murder of a drugs trafficker. What nobody around her knows is that she is the missing witness both the police and the killer are searching for. Nancy grew up under the wing of her best friend's father. When she becomes a cop and he turns out to be more than just a haulier, her loyalties are tom and she finds herself protecting him - until the night she can protect him no more. Now, as she hunts a killer, the killer is hunting her. Who can she trust? When your career - and your life - is at stake, you have to know who is, or isn't, on 'The Level'.