Nora leaves the convent where she has been raised to marry a relative. Just arrived she has an accident resulting in total amnesia. Her identity mistaken a new life begins for her, where she will encounter love, adventure and even crime.
Muggs and Glimpy, two East Side Kids in the army, return to their neighborhood, supposedly on furlough; actually, Muggs has been honorably discharged with a physical defect, but he tells no one of this.
Celebrated elderly Austrian poet opposes nazism, while his daughter admires and falls in love with leading nazi activist, who eventually becomes concentration camp commander with his father-in-law as prisoner.
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.
Mamsie catches Lulu making a mess of the kitchen, so she punishes Lulu. When Lulu asks, "How do you know that I made this mess?", the maid says sarcastically, "A little bird told me!" Angered that the bird outside her home snitched to the family's maid, Lulu goes after the bird with her slingshot.