All over London, criminals are being viciously attacked and left bleeding or crippled by vigilante cops. For some, this is no great tragedy -- after all, crime rates appear to be on the decrease. But it is inevitable that the situation must change, and Dan ‘Spider’ Shepherd, working for the Serious Organised Crime Agency, is instructed by his bosses that this form of justice without benefit of law court has to end. Shepherd, of course, has always been fully aware that fighting crime is a deeply ambiguous business, and that rules now and then have to be broken. But he realises that an unpleasant job has to be done, and gets on with it, even though he is unhappy with the task of investigating fellow police officers.