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.
After Pat Garrett kills Billy the Kid, Billy’s look-alike Roy Rogers arrives and is mistaken for him. Although a murderer, Billy was on the side of the homesteaders against the large ranchers. As Billy’s death is unknown, Roy gets Garrett to let him pose as Billy to continue the fight, but without the killing.