Explore the lure of the Old West and how it was won—and lost—through the blood, sweat and tears of many. Spanning 15 years before, during, and following the Civil War, from 1859 to 1874, embark 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 epic story of post-Civil War America, focusing on Cullen Bohannon, a Confederate soldier who sets out to exact revenge on the Union soldiers who killed his wife. His journey takes him west to Hell on Wheels, a dangerous, raucous, lawless melting pot of a town that travels with and services the construction of the first transcontinental railroad, an engineering feat unprecedented for its time.

In 1859, families discover the lure of the Old West as they settle in territories from Wyoming to Kansas. Meanwhile, a gruff cowboy finds himself on the run with a prostitute and a young boy after killing a fellow gunman.