A convicted murderer who has been studying law inside is given the chance to appeal and chooses to represent himself in court against James Steel - his former prosecutor.

A homeless man is found beaten and unconscious in a park. Because he is bipolar his testimony is disjointed and make him unable to identify his attacked. A neighbourhood resident is charged with the premeditated attack.

When three people are brutally murdered in a shop in central London and a fourth left for dead, Matt and Ronnie are up against the clock to find the killer who they fear could strike again at any moment. The nature of the attack was frenzied and brutal with the killer using a bayonet to slay his victims. With this information and a photofit, Matt and Ronnie are quickly must identify the killer before they strike again. James assumes a straightforward case ahead of him. However, things take an unexpected turn when he learns that the defendant has brilliant legal support. With the case for defence looking very strong, James' only hope is to convince a deluded defendant to accept responsibility for his crimes.