In 1932, after the death of their father, ten-year-old Polly and her older sister Maud must leave their home in Winnipeg and begin a new life with their grandmother on a remote island off the coast of B.C. Maud goes off to boarding school in Victoria and Polly, despite missing her sister, begins to adapt to her new life on the island. But on the edge of this budding happiness, is a dark secret that Polly struggles to keep.