 Daniel Harper (William Gould), with his daughter Alice (Martha Tibbetts), young son "Buzzy" ("Buzzy" Henry) and brother Joe (Franklyn Farnum)are part of a rich wagon train which is attacked by renegade leader "Bull" (Walter Miller) and his henchmen, posing as Indians. "Buzzy" rides to a nearby Ranger camp and brings Ranger Bob Allen (Robert Allen)and other Rangers to the rescue. The outlaws flee and Bob, trailing them, finds a tassel Bull has lost from a glove and also notes some boot-heel tracks, and concludes that white men were involved in the raid. In town, Bob sees that Bull has a tassel missing from his glove and is sure Bull is his man. But, trailing the gang, Bob is captured, Bull takes his Ranger badge and sends a henchman back to the wagon trail to impersonate a Ranger with fake orders to lure the Rangers away from the train.