The plot centers on fictional characters and takes place in pre- and post- Civil War America, and details the exploration of the American West. Depicting a twelve-year span, the movies feature an ensemble cast portraying various characters and their experiences pioneering into new territory from their homes.

Horizon’s official synopsis reads: “Spanning the four years of the Civil War, from 1861 to 1865, Costner’s ambitious cinematic adventure will take audiences on an emotional journey across a country at war with itself, experienced through the lens of families, friends, and foes all attempting to discover what it truly means to be the United States of America.”

The project is set in the American West during the Civil War years, 1861 to 1865. The story promises to chronicle the American expansion of the West in an all encompassing story about how the United States came to span from ocean to ocean.