The 60s, London: The Krays are on the increase, using their unmatched violent means to gain power over the city. One male, the courageous Investigator Nipper Read, is sent in to take on the awkward task of bringing the city back under the policy of law and tackling the nation's most been afraid mobsters at the same time. As he deals with bent coppers, political defamation, and horrified witnesses, Nipper becomes increasingly stressed, placing everything and also every person he understands in danger.