New recruit Mel is only just in time for the start of her shift and then has to confront an unpleasant situation in a block of flats.Meanwhile old hand Roy is out to settle a score with petty crook Vince Graves.
When Sergeant Griffin tries to talk down a man threatening to jump from a roof, events take a shocking turn. Mel sees her friend Nico in hospital after he has been beaten.He tells her that Roy took drugs off him without arresting him.