In this western, an accused killer is able to escape lynchers by trading coats with a dead man he found lying beside the road with an arrow in his back. He soon happens upon a farm. As the farm is under Comanche attack when he arrives, the man immediately saves the life of a woman and her son. He then takes the pair to Fort Dobbs. En route the woman realizes that the coat her hero is wearing belonged to her husband. Thinking the arrow hole in the back was caused by a bullet, the woman immediately accuses the hero of murdering her man. They arrive at the fort only to find it busily preparing for another Comanche raid. The clever hero devises an ingenious plan to defend them using the fifteen-shot repeating rifles brought by a gun trader. His ploy works. The Comanches are thwarted, his innocence is proven, and the young mother's good name is preserved.