Franz Josef has been Austrian emperor since 1848, yet he remains unmarried five years into his reign. His mother, Archduchess Sophie, is determined to ensure the Habsburg line and favours her niece Helene as the future empress. However, Franz has other ideas and prefers Helene’s 15-year-old sister Elisabeth, whom he marries. She struggles to deal with her new position as empress of Austria, motherhood, and her domineering mother-in-law. Endeavouring to carve some of her own space, she resumes a friendship with her old Hungarian mentor Count Majlath. Her fixation with his country is unwelcome at the court.

In the hope of promoting a liberal and united Germany, Queen Victoria and Prince Albert arrange for their eldest daughter Victoria ‘Vicky’ to marry Prince Frederick ‘Fritz’ of the Kingdom of Prussia. However, despite her love for the heir apparent and their growing family, the British princess is unprepared for the constraints of her new life in Berlin. Her politically liberal views and her influence over her husband clash with those of Otto von Bismarck and the Prussian doctrine of iron and blood. Bismarck wins influence over the Kaiser and surprises Europe with swift victories during the decisive Austro-Prussian War and Franco-Prussian War.

With Germany united under Prussia, Bismarck seeks a stabilizing alliance with the Austrians and Russians through the League of the Three Emperors. His plans extend to influencing the Kaiser’s grandson Wilhelm. In 1888, Wilhelm I and his successor Frederick III, both die (the Year of the Three Emperors). Kaiser Wilhelm II rapidly assumes the throne; Bismarck is forced to resign when his policies and political style clash with those of the young emperor. The ageing chancellor seeks support from Vicky, but she spurns him and blames his meddling for her estrangement from her son.

On 30 January 1889, tragedy strikes the House of Habsburg when liberal Crown Prince Rudolf of Austria-Hungary and his young mistress Baroness Mary Vetsera are found dead at the hunting lodge at Mayerling in the Vienna Woods, 24 km southwest of the capital, in an apparent murder-suicide by Rudolf. In Vienna, and at Mayerling, imperial officials contrive to hide the events of the Mayerling incident to prevent a massive public scandal, misleading the emperor and the empress about the true nature of the deaths. Rudolph’s letters and the report by Professor Widerhoffer finally reveal the truth to the royal couple. The episode, narrated in hindsight, ends with news of the assassination of the Empress in 1898 in Geneva.

Tsar Alexander III doubts the ability of his son and heir-apparent, Nicholas, to inherit the Russian throne. The young tsarevich is similarly apprehensive. Despite his longstanding affair with St Petersburg ballerina Mathilde Kschessinska and the disapproval of his mother over his marriage choice, he is resolved to marry Princess Alix of Hesse-Darmstadt, seemingly the suitable match. Traveling to Germany, Nicholas II is supported in this by his relatives, including his cousin Kaiser Wilhelm and Alix’s grandmother, the ageing Queen Victoria of Great Britain. Meanwhile, the autocratic conservatism of the Imperial Government has resulted in discontent among factory workers, under the ægis of the revolutionary Vladimir Lenin.