One grave too many

"Ross Chisenhall lies defenseless and defeated as four riders viciously kill his only son. In time he recuperates from near-mortal wounds, but he is left not only with a scar on his face, but a darkness inside that cannot be quenched until his child's death is avenged. Under an assumed name he escapes to the town of Mesilla, where he soon discovers that he can be as cruel and brutal as the most savage gunman - and finally gets his chance to show...