Set in post-Civil War America and centers on former Confederate soldier
Cullen Bohannan (Anson Mount), whose quest for vengeance has led him
westward to work on the construction of the first Transcontinental
Railroad.
A looming railroad deadline throws Cullen and Lily together; Joseph and Elam deal with what their violent mission has wrought.
Elam's life hangs in the balance, leaving Cullen with a monumental decision to make. Meanwhile, Durant risks his financial fortune, and Lily confronts her late husband's relatives
Durant challenges the Cheyenne to a competition in an effort to bring a halt to ongoing negotiations. Meanwhile, Elam and Cullen try to prevent bloodshed in town.
Cullen and Elam disagree after Durant's new suggestion for solving the railroad's financial problems is overheard. A traveling circus offers the railroad workers some reprieve.
Cullen gets a lead on the location of his target. Durant offers medical help to Lily Bell, but his real motives quickly become clear.
When Lily goes missing, Durant organizes a search party. A subsidiary request prevents Cullen from his continued search for the sergeant involved in the murder of his wife.
Lily encounters natives in the wilderness. Cullen is questioned in regards to his recent actions against others. Meanwhile, Durant continues his push for political gain through his persuasions.