A former Confederate soldier journeys to the Transcontinental Railroad to seek vengeance.

Cullen fights for his life as he answers for his deadly actions. Lily struggles to survive in the wilderness, as Durant attempts to spin tragedy for political gain.

Cullen's search for the sergeant is diverted by an unexpected obstacle. Durant organizes a search party to retrieve the missing Lily Bell.

Cullen gets closer than ever to the sergeant. Durant pursues a hidden agenda while helping Lily recuperate.

Durant's answer to the railroad's latest financial problems spurs a bareknuckle brawl between Cullen and Elam.

Durant attempts to end ongoing negotiations with the Cheyenne by challenging them to a competition. Meanwhile, Cullen and Elam scramble to prevent bloodshed in town.