Spy drama set in London and Cambridge. Johnny Worricker is a long-serving MI5 officer. His boss and best friend Benedict Baron dies suddenly, leaving behind him an inexplicable file which threatens the stability of the organisation. Meanwhile, a seemingly chance encounter with Johnny's striking next-door neighbour and political activist Nancy Pierpan seems too good to be true. Johnny is forced to walk out of his job, and then out of his identity to find out the truth. Show less