Story of a group of settlers and how they had to take refuge in a fort when they were attacked by Indians, as told by the only survivor

In an old fort dedicated to the service of change of chivalry, show up three hired murderers and warn Lohman, the manager, who is about to get a stagecoach traveling in the former judge who unjustly condemned to five years in prison , and of course the husband murderer now promised the judge, Ruth, indicating further that brings a suitcase with many dollars. However, Lohman rejects the suggestion of the bandits. But when the judge and his girlfriend, the fort was attacked by Indians.