Outlaw Sam Morley falls in love with a young woman who has a serious illness, and asks Lucas to turn him in for the reward and then use the money to pay for her medical care.

Newspaperman Byron Claremont specializes in profiles of famous gunmen. One of his stories was responsible for an old-time marshal's death; and his next subject is Lucas.

Mark finds himself in grave danger when two unscrupulous detectives searching for a man's long-lost son claim that it is Mark.

Mark discovers that the new preacher and his wife are impostors planning a robbery.

Lucas helps his former Army captain, now an undercover federal agent, infiltrate a gang of bank robbers.

The widow of a bandit killed by Lucas plots a grotesque revenge.

Lucas agrees to take a job as a federal undercover agent and goes to Wyoming to investigate rumors of sales of arms to renegade indians. His life is endagered by the town drunk who stumbles onto his true identity and purpose. (Part 1 of 2)

Mark heads for Wyoming to search for Lucas, who's on the trail of a gang illegally selling weapons to the Indians. (Part 2 of 2)

Mark goes to work for Will Temple, a badly scarred and very mysterious rancher.

A speculator will stop at nothing to grab Lucas's land.