The Lyons family gather in 2019, unaware that their future holds many surprises. Absent sister Edith brings news from abroad that will change their lives forever.

As the world recovers, Stephen and Celeste face a very modern nightmare, Daniel fights to keep hold of Viktor, and Edith finally returns home, carrying a terrible secret with her.

Daniel uses his birthday party to reveal a dangerous plan. And as Viv Rook rises to power, the Lyons gather for a funeral. But Celeste is left to fight alone as Bethany's obsession.

Daniel embarks on a dangerous quest to bring Viktor home, while Celeste takes a terrible revenge on Stephen. Viv sets her sights on the ultimate prize: 10 Downing Street.