The story is concerned with the activities of a gang of diamond thieves, who respect no law. One of them, Bull Davidson attacks a girl, Virginia Marsden, whose father has discovered their activities and whom they have threatened to kill. She flees to a cabin. They follow her -- Bull annoys her -- and Bob Cullen, a Secret Service man in disguise overturns a lamp to effect escape. During their ride the horse has an unfortunate fall, after which he is seen limping and Bob and Virginia are forced to spend the night on the plains. They are again overpowered by the gang, who lasso the hero and swing him in the air, suspended from a tree. They then make off with the girl and her helpless father and throw him out of the wagon with intent to kill him. Subsequently the girl is brought to camp and again treated with indignity and there are several fights between the various factions.