When 17-year-old Juliet Dufresne receives a cryptic letter from her enlisted brother and then discovers that he’s been reported missing in action, she lies about her age and travels to the front lines as an army nurse, determined to find him. One patient of hers in particular, a deserter awaiting court-martial, may hold the answer to her brother’s whereabouts --- but the trauma of war has left him catatonic.

It is 1913. Elsa Pendleton travels from England to Easter Island with her husband, an anthropologist sent by the Royal Geographical Society to study the colossal moai statues, and her younger sister. What begins as familial duty for Elsa becomes a grand adventure; on Easter Island she discovers her true calling.