Ballard and McCall 6: Hard Trail from Yesterday

Jess McCall was under threat from an unknown enemy. Then he had to face a shootout with a man he didn’t know. Even then there’s no peace, when he’s lured into a confrontation with hired guns. Only by using his own gun-skill does he stay alive, though severely wounded.
Making it back to town, with his wounds showing infection, it suddenly falls to his partner, Chet Ballard, to step in to face the still existing threat.
Through his dogged persistence, Ballard starts to unravel the mystery behind the attempts on his friend’s life, and learns that they’re facing the desperate efforts of a man from McCall’s past who wants nothing less than McCall’s death as a way of hiding the truth of his near forgotten crime.