
Lucas McCain raises a son while battling desperados in New Mexico.
Mark's finding of the body of a murder victim starts Lucas, his friend Artemus and Marshal Torrance on a search for the killer.
A band of Indians kidnaps Mark and disappears into the hills.
Lucas is the town's representative to the railroad commission until an infamous train robber dies and leaves his ill-gotten wealth to Lucas; Lucas must clear his name and stop the reckless ambition of his replacement.