The town of Bootstrap, Nevada, was being terrorized by a killer they called the Big Fifty Sniper. Folks had a hunch it had something to do with the Lost Pistol silver mine, but no one knew for sure. Then Jim Sundance, the half-breed professional gunman, rode into town. He was just in time to save young Billy Mercer from a hangman's knot. Furthermore, he was also willing to chase the sniper down ... for a price. There was no job too touch for Sundance, if the price was right.