Stony Diamond. The Texas Shootist, goes to Del Rio, Texas, searching for the sister who left him at a Ft. Worth orphanage when he was a toddler. But Del Rio is a town caught between the two sides of a Texas feud. There are people in town who have heard the name of Stony's sister, Crystal Diamond, but there is nothing else they can tell him. His search has led Stony to a man named Sloan Rush. The gambler and saloon owner admits to knowing what Stony wants to find out. But the man isn't willing to share his knowledge -- not while the feud rages, and the town is in danger. Stony takes on the job of Town Marshal and works to keep the two sides apart - but incident by incident, an explosion is coming.