An illiterate stooge in a traveling medicine show wanders into a strange town and is picked up on a vagrancy charge. The town's corrupt officials mistake him for the inspector general whom they think is traveling in disguise. Fearing he will discover they've been pocketing tax money, they make several bungled attempts to kill him.
As a penalty for fighting fellow classmates days before graduating from West Point, J.E.B. Stuart, George Armstrong Custer and four friends are assigned to the 2nd Cavalry, stationed at Fort Leavenworth. While there they aid in the capture and execution of the abolitionist, John Brown following the Battle of Harper's Ferry.
As a parting shot, fired reporter Ann Mitchell prints a fake letter from unemployed "John Doe," who threatens suicide in protest of social ills. The paper is forced to rehire Ann and hires John Willoughby to impersonate "Doe." Ann and her bosses cynically milk the story for all it's worth, until the made-up "John Doe" philosophy starts a whole political movement.