The show focuses on Mitsuko Aoyama (1874-1941), who was the first Japanese woman to marry a westerner.

The musical tells the story of Elisabeth ("Sissi"), the Empress of Austria, from her engagement and marriage in 1854 to her murder in 1898 at the hands of the Italian anarchist Luigi Lucheni, through the lens of her growing obsession with Death as her marriage and her empire crumble around her at the turn of the century.