When Bigshot Jones gives his unnamed dog to the All-For-One Club, Buckwheat quickly names the canine "Smallpox", inadvertently causing a city-wide panic.
An insurance representative is seduced by a dissatisfied housewife into a scheme of insurance fraud and murder that arouses the suspicion of his colleague, a claims investigator.
Dan Stanton and Condon are foreclosing on a group of ranchers in order to gain a land-monopoly. They have one of the ranchers, whose property supplies the others with water, killed.
Feature version of the 1941 American serial film of the same name, made for export only, never shown in the USA in any medium, and evidently a lost film.
With a plot line mostly lifted from 1941's "White Eagle", Columbia's 24th serial (following "The Desert Hawk-1944" and ahead of 1945's "Brenda Starr, Reporter"), "Black Arrow" finds carpet-baggers Jake Jackson and Buck Sherman arriving in Blue Mesa in search of gold.