The Metropolitan police are in need of a major public image revamp and Chief Constable Richard Miller (James Nesbitt) thinks he s found just the right person for the job. For Liz Garvey (Brit Marling), a visionary from the world of new media and the woman tasked with revolutionising the force s image the job couldn t have come at a worse time as an outbreak of chaos and violence erupts in the capital.