Bat Masterson roams the frontier and defends the innocent.

Bat tries to help Clyde Richards negotiate the purchase of an old mining road to create a route through the mountains, but when Bat recognizes the holdout owner from his past, the mission takes a dark turn.

At Crazy Creek Station, an Indian and his gang take Bat, Major Mars and Lottie Tremaine hostage to exact revenge upon Mars for a number of crimes he committed against Indians.

The owner of a casino in Paradise, Colo., refuses to pay the debts and taxes he owes, prompting Bat's appointment to the role of county tax assessor.

Bat faces a series of challenges as his crew builds a railroad in Colorado, including natural disasters, lost equipment and charges against Bat for a murder he didn't commit.