Phyllis Coates, TV's erstwhile Lois Lane, essays one of her largest film roles in Blood Arrow. Coates is cast as a devout Mormon girl whose mission is to transport smallpox vaccine to her friends and neighbors. Unfortunately, this requires her to journey through hostile Indian territory. Appointing themselves as the girl's unofficial protectors are Indian scout Scott Brady, trapper Don Haggerty and (reluctantly) gambler Paul Richards.
A woman leads an expedition into a remote jungle to find her long-lost brother, but instead finds a mad scientist who has created a fungus monster that feeds on the local inhabitants.
A woman is possessed by the spirt of her husband's deceased first wife, turning her into a cold, scheming flirt who will stop at nothing to get what she wants. The woman's sister, husband and the sister's new boyfriend struggle with accepting what has happened, who has caused it and how to correct it, which soon brings them into contact with a coven of devil-worshippers and forces of the supernatural.
This melodrama tells the tale of a great battle between the French Foreign Legion and the rebellious Arab tribe, the Tuaregs, who fight it out upon the blistering Sahara sands. Just before the Legionnaires embark upon their dangerous mission, the commander discovers that he is being cuckolded by his lieutenant. Because the mission is urgent, there is no time to fight over the commander's wife. Unfortunately, as they travel, the tension between the two mounts and they begin squabbling over how to plan the attack. Their inability to work together results in tragedy.
Alcoholic former cavalryman Hack Williams is arrested for killing an Indian, something he did not do. The townspeople, fearful of Apache reprisals, plan to hang Williams in hopes of heading off an attack. But the attack comes and Hack, locked in his jail cell, is the only survivor as a massacre occurs. Into the scene of carnage arrives schoolteacher Nora Haynes. Together she and Williams must find a way to reach safety before another Indian attack. But the pair are by no means well-matched, and their trip alone across the desert is not destined to be an easy one.
A cowboy stampedes a Rebel plot with a Union spy posing as a dance-hall girl.
