Randolph / the Black Whip dies after a fight with Hammond's goons but his sister Barbara (Linda Stirling) dons the Black Whip costume and continues the fight against Hammond with the help of agent Vic Gordon (George J Lewis)...
What follows are a standard series of fights, speeded up horse riding and revolvers which contain an amazingly large number of bullets plus lots of cliffhangers of course. This is a decent if not exceptional serial but what makes it stand out is the female lead which was highly unusual for it's day.