Taken from her native Iceland to Scotland in the early 1950s when her widower father drowns at sea, young Gemma Hardy comes to live with her kindly uncle and his family. But his death leaves Gemma under the care of her resentful aunt, and she suddenly finds herself an unwelcome guest. Surviving oppressive years at a strict private school, Gemma ultimately finds a job as an au pair to the eight-year-old niece of Mr. Sinclair on the Orkney Islands—and here, at the mysterious and remote Blackbird Hall, Gemma's greatest trial begins.