In the dying days of the Edwardian Empire, Christopher Tietjens enters into a destructive marriage with the beautiful but cruel socialite Sylvia.

Ignoring her overt flirtation with other men, Christopher resolves to remain faithful to her, even when he encounters fearless young suffragette Valentine.

Vicious rumours about Christopher abound, leading to tragedy at Groby. Sylvia finds a new admirer who proves a distraction as the war continues, and Valentine moves to London. Meanwhile, Edith and MacMaster plan a new life together.