As gunfighter Nathan Stone tries to live out his days in peace, the discovery of a son he never knew he had may force him to strap on his six-shooters and take once more to the vengeance trail.

Riding into the town of Smoky River on a mangy mule, Dane looks as broken down as his old mount. His Stetson is ragged, his boots are tied together with leather thongs, and he wears a Colt Army revolver with exactly three bullets. He wouldn't know what to say if you asked him where he got the gun, or how he learned to shoot it so well. He doesn't know if Dane is his first name or his last. Something happened that cost him much of his memory, and he...