On the eve of World War I, twenty-one-year-old Georgie Hyde-Lees meets the acclaimed poet W. B. Yeats at a soir?e in London. Although Yeats is famously eccentric and many years her senior, Georgie is drawn to him, and when he extends a cryptic invitation to a secret society, her life is forever changed. As zeppelins stalk overhead and bombs bloom against the skyline, Georgie finds purpose tending to injured soldiers in a makeshift hospital...