Slim Sanglant, released from prison, is now seeking revenge against those in Upamona who helped put him there, and Red Skene, former U. S. Marshal and now County Sheriff is the man on his trail. There is a killing, houses and a barn are set on fire, and people come up missing before Red can get to the bottom of it. And get to the bottom of it he does with the help of his half-breed deputy, Bushy Carlsen, who is hit by a bolt of lightning that knocks him unconscious just as he sees who he thinks may be setting the fires. But who was it? And while Red is looking for the killer and arsonist, his wife is thinking about someone else and having serious doubts about their marriage.