At the dawn of the cowboy era, a mysterious disease threatens to derail the dreams of Texas cattlemen and their cowboys. One man vows to find a cure--and get fabulously rich at the same time. In a bold gamble, Joe McCoy builds a city in the middle of nowhere: Abilene--the first "cow town"--whose legacy would reshape the West.

This is the true story behind one of the most notorious names from the Golden Age of the Wild West. Who was "Billy the Kid"? A cold-blooded killer who murdered 21 men? Or an orphaned teenager driven to revenge the death of the only man who offered him a place to belong? Welcome to gang warfare--Wild West style.