In 1891, in a small town in South Dakota, a stagecoach is robbed and the driver is killed. A small fortune in silver dollars has disappeared and the only suspect is Benjie Galt, the son of Sheriff Sam Galt. Benjie claims he's innocent but witnesses place him at the scene of the murder-robbery. Heart-broken but honest, Sheriff Galt arrests his own son and prepares for the trial by hiring the best lawyer in the country to defend Benjie. The Sheriff also hires a local detective to investigate the scene of the stagecoach robbery and possibly dig up any new evidence or witnesses to help clear Benjie of the crime. However, when a silver dollar from the robbery loot turns up in the local saloon, the trail leads straight to Benjie.