Kristin Uys is a tough Roodepoort magistrate who lives alone with her cat. She is on a one-woman crusade to wipe out prostitution in the town for reasons that have personal significance for her. Although she is unable to convict the Visagie Brothers, Stevo and Shortie, on charges of running a brothel, she manages to nail Stevo for contempt of court and gives him a summary six-month sentence. From Diepkloof Prison, the outraged Stevo orchestrates his revenge against the magistrate, aided and abetted by his rather inept brother Shortie and his erstwhile nanny, Aunt Magda, who believes mass action will force the powers that be to release Stevo. Kristin receives menacing phone calls and her home is invaded and vandalised. Even her cat is threatened. The chief magistrate insists on assigning a bodyguard to protect her. To Kristin's consternation, security guard Don Mateza moves into her home and trails her everywhere. Nor does this suit Don's long-time girlfriend Tumi, former model and successful businesswoman, who is intent on turning Don into a Black Diamond sooner rather than later. And Don soon finds that his new assignment has unexpected complications which Tumi simply does not understand.