Johnny Worricker (Bill Nighy) is a long-serving MI5 officer. His boss and best friend Benedict Baron (Michael Gambon) dies suddenly, leaving behind a contentious file whose explosive contents threaten the stability of the organisation. Meanwhile, a seemingly chance encounter with Johnny's striking next-door neighbour and political activist Nancy Pierpan (Rachel Weisz) seems too good to be true. Johnny is forced to walk out of his job, and then out of his identity to find the truth.
Does MI5 really just provide evidence to suit the cabinet? Is the prime minister (Tony Blair) really so focused on doing anything to appease the USA? Probably. Is there ever going to be a member of MI5 who is prepared to have a show down with the cabinet and secret service? Probably not. It is however a good spy fiction drama. Bill Nighy is immeasurable talented. His character was utterly immersing and intriguing. This is for those who enjoyed Tinker, Tailor, Soldier, Spy or like Nighy or just a good drama.