A new Britain begins to take shape with Viv Rook (Emma Thompson) as prime minister. Edith (Jessica Hynes) tries to investigate mysterious stories about The Disappeared, while Rosie (Ruth Madeley) finds her estate fenced off by the privatized police. As the climate worsens, flooding creates British refugees, forcing Muriel (Anne Reid) to reveal problems of her own.
Stephen (Rory Kinnear) and Celeste (T'Nia Miller) unite to support Bethany (Lydia West) when she's chosen for an upgrade at work and, desperate for money, Stephen takes a job with his old friend Woody (Kieran O'Brien), leading to the most extraordinary meeting of his life.
