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.

This documentary-series examines Grant's life story using his perspective and experiences to explore a turbulent time in history: the Civil War and Reconstruction.