This adventure of Hunt-U.S. Marshal is filled with drama, excitement, and suspense. Hunt is notified that he is receiving a new man to replace, Dodd. Hunt is warned that the new man has a problem with authority, and knows he will have to straighten him out fast if he has any chance of making it as a U.S. Deputy Marshal. Hunt leads his men to Idaho territory where they are searching for two mountain men that are leading a band of Indians and are actively raiding wagon trains and murdering other mountain men for their horses, furs, and supplies. Hunt encounters an angry Shoshone Chief that demands he surrender his horse and Gray Wolf in exchange for safe passage out of their territory. Horse returns from a mission and discovers his mother is missing. Anger sets in when he finds out she married a crude mountain man. Horse is angered, and is determined the man. Bekins shocks Hunt when he appears for a visit with his two instructors. The reason for his visit stuns Hunt, and he is devastated by the loss. Hunt's men must go to a ranch to arrest a man where it has been warned that any lawman will be shot on sight. Other marshals are sent to arrest a crazed madman that declares he is, Satan's Angel.