Following the loss of their son, a retired sheriff and his wife leave their Montana ranch to rescue their young grandson from the clutches of a dangerous family living off the grid in the Dakotas.

When down-to-earth Alex says yes to her boyfriend's marriage proposal, she has no idea that her future-in-laws are none other than Mr. and Mrs. Claus.

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.