Lone star and the gunpowder cure.

Jessie and Ki rode for the Arizona Territory just in time to see the burial. But it didn't take long for the Lone Star team to dig up the real reason behind the murder -- and why certain parties, including a quack doctor, have a stake in a bitter range war. The whole dirty deal was branded with all the markings of the cartel and its evil influence. And Jessie and Ki had to stop the feverish spread of savage killing -- or die in the process.