Teenager Kelvin Stagg is shot dead in a London street. Then politician Stephen Collins breaks down when he hears his assistant Sonia Baker has been killed by falling under a train. A newspaper editor asks his journalist Cal McCaffrey (Stephen's former campaign manager) to look for a connection between the two deaths, and McCaffrey finds the dead teenager had stolen a silver metallic briefcase. McCaffrey traces the briefcase and in it he finds pictures of Stephen and Sonia - and a gun.
Elenco: Bill Nighy , David Morrissey , Kelly Macdonald , John Simm , Polly Walker , Philip Glenister , James McAvoy , Michael Feast , Amelia Bullmore , Marc Warren , Rebekah Staton .