The film is written and directed by Ashley Avis, and the story is based on Anna Sewell's best-selling novel of the same name completed in 1877. The original novel is expressed in the first person from the perspective of "Black Stallion", depicting an autobiographical memoir belonging to "Black Stallion". The film will focus on the deep emotional bond between 17-year-old girl Jo (played by Foy) and "Black Stallion" (voiced by Winslet), and it is "Black Stallion" that helps Jo get over the mental trauma of her parents' death.