Historical, United States 

As the nation recovers from the Civil War, Sky and Rebekah Winslow's wayward son Mark is slowly making his way north after his release from a Mexican prison. Headed for Omaha to work for the Union Pacific Railroad, he is forced to shoot a man, then thrown into jail to await his prison sentence. In a small Texas town where justice will not be served, Mark's only hope is the young woman whom he defended. Lola Montez had attempted to escape the horrible life she inherited from her mother, but she was held by circumstances beyond her control. When Mark Winslow stopped her attacker, he also became her ticket out of town. If Lola can break him out of jail, surely he will take her with him to look for her father in Omaha. But a jailbreak is a small matter compared to what they will face. Mark becomes a trouble-shooter for the Union Pacific, responsible for law and order in the towns that spring up as the railroad heads west, and he must live by his gun.