A poor family in Florida saves all the money they can in order to plan something special for the soldier they've invited to Sunday dinner. They don't realize that their request to invite the soldier never got mailed. On the day of the scheduled dinner, another soldier is brought to their home and love soon blossoms between him and Tessa, the young woman who runs the home.
In Madrid, Spain, at the end of the 19th century, the young and reckless Basilio seems to be the only person who perceives the spectral presence of Professor Robinsón de Mantua, who begs him to take care of his niece Inés, because she is in grave danger.
Henny Brown, talent scout for the Margaret Ames Film Agency in Hollywood, mistakes Broadway show understudies Judy and Marian, for stars Betty and Eileen, and signs them up for movies.
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.
This one finds Jack Slade and Mary Conway,alias Blanche, being recognized as known and wanted crooks by deputy marshal Harry Stevens and, when he orders them out of town, Slade kills him.